ELECTRIC IRELAND NEARLY ZERO ENERGY
BUILDINGS OPEN DOORS IRELAND 11TH - 13TH NOVEMBER 2016
learn share inspire WWW.NZEB-OPENDOORS.IE
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Smarter Living
CONTENTS
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Upskilling to meet the NZEB Challenge
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Air-to-water Heat Pumps
Retrofit in Ranelagh
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Campus Conference 17 Centre by Cooney Architects
ROCHESTOWN HOUSE 18 Social housing refurbished to the EnerPhit Standard
NZEB Special Events
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A1 rated New House in Dublin 5
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Madeira Oaks - Energy Positive, Passive Housing Development
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SuperHomes - Retrofitting to an A1 Rating
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Property Listings www.nzeb-opendoors.ie
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New
Passive Performance Built-in Cavity System
CavityTherm Flex The NEW CavityTherm Flex is the perfect solution when insulating fair faced inner block walls or when block is laid flat resulting in an uneven surface to accept the insulation. The 25mm flexible fibre layer absorbs any variations due to block tolerances, providing a continuous unbroken bond between insulation layer and block.
Range of accessories available building to a full insulation system Advanced Engineered Detailing Cushioned backing to eliminate indentations Excellent Thermal Bridging Y-value Robust moisture protection facing 0.12 U-value in 150mm Cavity
www.cavitytherm.ie
Electric Ireland NZEB Open Doors 2016
LEARN, SHARE & INSPIRE!
The fourth Electric Ireland NZEB Open Doors event takes place from 11th-13th November 2016. The theme of this years event is “Learn, Share, Inspire” which neatly sums up the essence of the event. As Ireland heads into the nearly zero energy building (NZEB) era, this new standard will present a real challenge to designers and specifiers and will require a lot of new learning and upskilling. Many of our Third Level colleges are already working towards this goal by developing and delivering a range of new NZEB training courses, all developed under EU programmes. We have included a special ‘Learn’ feature on three particular training initiatives that focus specifically on NZEB-related skills. These training programmes are aimed primarily at practicing professionals and construction workers and it’s refreshing to report that the demand for places has exceeded supply in some instances. We owe a big thank you to all of our exhibitors who continue to open their doors to share their experiences and, in doing so help others to get first-hand knowledge, and indeed to inspire them, before they embark on their own projects. Indeed, some of the visitors to our previous Electric Ireland NZEB Open Doors events, have since completed their projects and have joined our collection of exhibitors around the country so the full circle has evolved which is a tribute to all involved. EU wide, from January 1st 2021 all new buildings throughout the EU will have to comply with the new (NZEB) standard. For public buildings, that are owned and occupied by public authorities, the NZEB standard will be introduced from January 1st 2019 which is really not that far away when you come to think of it. The Department of Housing, Planning, Community and Local Government will issue the Draft NZEB standard for Buildings other than Dwellings for consultation during the fourth quarter of 2016, leading to its introduction in 2017. So there are exciting times ahead for sure! Learn more about the NZEB standard at
http://nzeb-opendoors.ie/nzeb-eu-directive-mean www.nzeb-opendoors.ie
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Upskilling to meet the NZEB Challenge
Achieving the nearly zero energy building standard in both new build and retrofit projects requires the application of low energy design principles and technologies and a focus on quality building practices with increased collaboration between design professionals, construction workers and end users throughout the design and build process. This presents an enormous challenge for all involved requiring education and upskilling on an unprecedented scale across the EU. To kick start this process, a number of EU funded projects have been rolled out aimed at addressing the knowledge gap that currently exists. Here we give an overview of 3 EU projects developed to meet the NZEB challenge.
Meeting of Energy Professional Skills (MEnS) About MEnS is an EU Horizon 2020 research project conceived to enhance the NZEB skills of building professionals through a series of accredited short educational training programs in 11 EU countries. The aim of MEnS is to upskill 1800 architects, engineers and building managers across Europe and contribute to the creation of a European NZEB professional network. The Dublin School of Architecture at DIT is one of 10 universities across the EU participating in this research project.
Professional Energy Skills in NZEB Central to the MEnS project is the ‘Professional Energy Skills in NZEB’ module - developed by DIT with EU funding. Dublin School of Architecture offered this module free of charge to 120 professionally qualified and experienced Architects, Engineers, Building Surveyors and Architectural Technologists. This is a part time Level 9 postgraduate module, delivered in blended online mode over an intensive 10-week period, and leads to the award of a CPD Certificate in Professional Energy Skills in NZEB. 80 students have completed the module and the third cohort of 40 is currently underway.
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The Professional Energy Skills in NZEB module covers NZEB legislation and policies, exploration of available technologies through two case studies, renewable energy sources, energy calculations, building life cycle and cost optimal design and a choice of training in either the Dwelling Energy Assessment Procedure (DEAP) or the Passive House Planning Package (PHPP) calculation methods For more, go to http://www.dit.ie/architecture/mens/.
PROF / TRAC About PROF/TRAC is a three-year EU funded project with 15 partners from eight countries. It started in March 2015 and was initiated by an interdisciplinary team dealing with NZEB construction and refurbishment including universities and European umbrella associations of engineers, architects and social housing. A successful design and construction process towards NZEB construction and renovation requires innovative design processes and technologies based on an integrated design approach and multi-disciplinary work teams. However, this approach is not yet common, as the building sector still works in a fragmented process.
Project Objectives PROF/TRAC is aimed at technical experts, architects and building managers involved in NZEB design and construction. The project offers a solution to overcome barriers, such as limited skills, lack of collaboration and lack of harmonised certification and qualification, by developing an Open Training Platform and Qualification scheme for Continuing Professional Development for professionals in the building sector. This European qualification scheme will be part of a life-long learning process for continuous development and up-skilling of professionals.
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 649473.
Project Outcomes The four main outcomes of the Prof-Trac project will be: •
• • •
Mapping of the required skills and current skill gaps of professionals in NZEB, i.e. comparing the required skills versus present skills, existing qualifications, knowledge sources, education programmes and accreditation/ certification structures. Development of an Open Training Platform and an EU level Qualification scheme. A Train-the-Trainers programme for the developed curriculum and qualification schemes. Development of a bank of training materials for use in education and post-graduate training.
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Speakers at the QualiBuild Final Conference (from left) Philippe Moseley, Seamus Hoyne, Ciaran Lynch, Minister Damien English, Dara Stewart, Mark Keyes, Darragh Lynch, Padraic Cullen
BUILD UP QualiBuild About QualiBuild is an EU funded BUILD UP Skills project aimed at addressing Ireland’s current knowledge gap in the construction industry in relation to building quality and energy efficient buildings. The BUILD UP QualiBuild programme was established in November 2013 as part of wider efforts to create employment and to assist Ireland in achieving its EU 2020 energy efficiency targets.
and (2) provide a register listing approved and trained craft workers. QualiBuild is managed and coordinated by Limerick Institute of Technology with partners Dublin Institute of Technology, Blanchardstown Institute of Technology, the Irish Green Building Council and The Construction Industry Federation. The project concluded on 31st July 2016. However a number of the QualiBuild initiatives, including the training programmes and the Construction Worker Skills Register will continue thereafter.
The aim of the project is to (1) improve standards by providing training for construction workers employed
Training Programmes
The Construction Worker Skills (CWS)
QualiBuild provides two training courses: ‘Foundation Energy Skills’ and ‘Train the Trainers’ programmes focussing on teaching skills to ensure that new construction and retrofitting work is both of high quality and energy efficient.
The CWS Register is an online register of training for Site Operatives and Craftworkers in the Construction Industry in Ireland. To register, all must complete a minimum of a Foundation Energy Skills (FES) training course or a FES Train the Trainer course. The aim of the registration system is to:
The Foundation Energy Skills course provides know how and practical information for building construction workers focussing on Quality, Energy Efficiency, Best Practice and System Thinking. Places are now available on a new Foundation Energy Skills programme in Dublin.
•
http://www.qualibuild.ie/fes-programme-sustainability-skillnet
Co-funded by the Intelligent Energy Europe Programme of the European Union
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• • • •
Provide an online platform where construction workers can display and store their training records; Demonstrate the level of knowledge and training achieved by individual construction workers; Raise awareness of training and skills development in the construction industry; Promote the importance of training to potential clients / employers looking for construction workers; Provide reassurance and transparency to potential clients.
For more, go to: https://www.constructionworkerskillsregister.ie/
Electric Ireland Reward Energy Efficient Customers By Over €2 Million In July 2014, Electric Ireland launched their Energy Efficiency Incentive to all existing customers. The scheme, the only one of its kind in the utility market, is designed to reward customers who improve the energy efficiency of their home. Since the launch, over 5,000 customers have used the Incentive to reduce the cost of their efficiency upgrades with an average reward of €440. Electric Ireland have partnered with five energy services specialist firms offering nationwide coverage. To avail of the incentive, customers simply complete the energy efficiency work through any of our partners and the reward will be credited to customers account within 10 days of completing the work. The Energy Efficiency Incentive is available in addition to the SEAI Better Energy Homes Grant. All partners of Electric Ireland complete the works in line with SEAI standards. For more information visit www.electricireland.ie/efficiency
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Air-to -water Heat Pumps
Introduction Over the last decade air-to-water heat pumps have become a popular renewable choice for heating and hot water systems for both new and retrofit projects. As this is a relatively new technology, a lot of questions and misconceptions arise and the following article seeks to address these.
by Calin Tasnadi Daikin Ireland
What is a Heat Pump and what is an Air-to-water heat pump? Heat Pump technology has been present in our kitchens for many years – see your fridge. The principle of a heat pump is to move energy by means of electricity, refrigerant gas and a compressor to provide both HEATING and COOLING. To HEAT, the heat pump extracts heat from the air outside our homes and transfers it inside our homes. An AIR-TO-WATER heat pump transfers the heat obtained from the outside air to the water in our heating systems.
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02
01
03
04
How does the Air-to-water heat pump work?
01
02
03
Air passes the heat
The vapour passes into
Hot vapour is condensed
exchanger outside called
the compressor and by
in the 2nd heat
the EVAPORATOR
compression increases
exchanger, the heat
and the refrigerant
its temperature and
being passed via water
gas absorbs heat
pressure.
to the space heating
from outside air and
or domestic hot water
evaporates.
system.
04 The liquid refrigerant passes back through the expansion valve, reducing its pressure ready to start the cycle again.
What happens when outside temperature are very low? Heat pumps are typically designed to operate at outdoor temperatures as low as -25 °C. Most air-to-water heat pumps are equipped with an electrical back-up heater, which can be programmed to provide heating when external temperatures fall below the specified equilibrium temperature. This is usually set at -3 °C but in most cases the electrical back-up is not required for heating at all. What is the efficiency of an the Air-to-water heat pump? A heat pump’s efficiency is often referred to as a Coefficient of Performance (COP) and all heat pump manufacturers state this value for nominal conditions of 7°C outdoor temperature and 35 °C flow temperature. The COP describes the ratio of electrical power used to heating power produced under fixed input and output laboratory conditions by the heat pump unit only. A COP of 4 means for every 1kW of electrical energy used, 4kW of useful energy is produced – a net 3kW of useful energy will be generated ‘free’ by the heat pump. The COP decreases with falling ambient air temperatures and rising flow temperatures. The Seasonal Performance Factor (SPF) or Seasonal Coefficient of Performance (SCOP) describes the ratio of the amount of electrical energy used by all components associated with the heat pump system, to the amount of heat energy delivered to the heating system, over a long period of time (e.g. season or year). SPF is a better indicator of performance for the purposes of examining the “real-life” performance of a heat pump than COP and takes into account the full heating system installed. This is captured within SEAI’s new heat pump methodology and by using their Heat Pump Calculation Tool we can calculate accurate SPFs based on data that every heat pump manufacturer has to provide. Does the type of heat emitter have an affect on the SPF? SPF values may vary depending on the type of heat emitters used and aiming for a low flow temperature will result in high SPF figures. Ideally with an Air-to-Water heat pump we should use an underfloor heating (UFH) system because this only requires flow temperatures up to 35°C, resulting in SPFs of over 500%. www.nzeb-opendoors.ie
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Case Study We can also use low temperature radiators or fan coils which require flow temperatures up to 55 °C, resulting in SPF’s around 400%. Comparing these two figures we can see that the UFH system compared with a low temperature radiator / fan coil system is circa 20% more efficient. Hot water production efficiency for any heat pump is around 200% due to the high flow temperature required to heat the hot water. This also takes into account that most air-towater heat pumps require an electrical immersion to raise the temperature in the tank to 60 °C, as an anti-legionella protection. How can an Air-to-Water heat pump be integrated in a new dwelling and help to achieve Part L compliance with the Building Regulations? To comply with current building regulations all new dwellings require minimum renewable thermal or electrical contribution, to achieve Part L compliance. In most cases an Air-to-water heat pump solution can meet these requirements without the need for any other renewables contribution. At an early stage of the project the designer of the system should work closely with the BER assessor to make sure that the Air-to-water heat pump can comfortably meet the heating load of the house and provide enough renewables to meet Part L requirements. Heat loss calculations should be done in accordance with current standards and regulations. In most new dwellings the hot water will be produced and stored during off-peak space heating demand periods during the night and around mid-day. Air-to-water heat pumps are by far the most cost effective and efficient systems that can be installed. Moving towards the new NZEB standards, they provide a perfect solution to reduce our carbon footprint and tackle future rises in fossil fuel costs. 12
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Daikin have produced the following estimations of running costs for a new 200m2 detached house with an 8 kW air-towater heat pump (ERLQ008CV3), underfloor heating and a 260 litre hot water cylinder. Estimated Space Heating Running Costs per Month
Space Heating Cost Comparison
Space Heating CO2 Emissions Comparison
Retrofit in Ranelagh by Alberta Congeduti
A big challenge! When we were looking into buying our home three years ago, we had one imperative in mind. It had to be a south-facing building! In the end, we bought a small south-facing terraced house, in between Ranelagh and Rathmines which we lived in for almost three years, until we could afford to refurbish it. During that time, my main thought was: how on earth can a house (I mean a south facing one!) be so cold and so dark??? We decided then to retrofit the house and redesign the extension to get better energy, light and comfort standards, trying to respect as much as possible the historical roots of the
original house, which dated from the 1880s. We hired an architect, the incredibly patient Passive House designer Patrycja Kochaniuk, who assisted us in this complex task. Our main objectives were to: • • •
Maximise sunlight and solar gains, in a long and very narrow house. Build an energy efficient extension, in the most sustainable way. Keep the old part of the house as close to the original as possible.
The extension design maximises the glazing area, in order to optimise the south facing aspect. To achieve this, we flipped the plan of the existing 1990s extension, in order to have one of the extension sides facing WestSouth West, rather than East-North East. Good project management including very extensive and detailed research of highly efficient window providers allowed us to achieve the maximum area of south facing glazing within budget. We are very happy to say, our cost effective solution is provided by a fully Irish manufacturer!
We are using timber frame for the extension, with cellulose between studs and an external layer of woodfibre insulation. This allows us to obtain a high thermal performance within a relatively small wall thickness (230mm), which was crucial in order to get the most of the space in a 5m wide property. Last but not least, this is also one of the most sustainable building techniques, especially from a life cycle perspective.
In the old part of the house, which includes a red brick façade, we didn’t want to be driven by “insulation madness”, but rather by historical conservation purposes. Among other things, we are restoring sash windows and we are internally rendering the red brick façade with a lime plaster mixed to cork, thus replacing the existing gypsum plaster which was placed there during a retrofit in the 1990s. One of the advantages of the lime plaster, apart from providing a small extent of insulation due to the presence of cork, is a combination of breathability and capillarity, as well as alkalinity, which all contribute to reduce the risk of mould growth. 14
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When the ventilation strategy had to be chosen, we were hesitating between demand control and mechanical ventilation with heat recovery (MVHR). We would liked to have gone for demand control, in order to avoid having to look after any mechanical equipment. However the PHPP simulation gave us a far better performance with MVHR than with demand control, if we achieved an airtightness of less than 2.5/3 air changes per hour. We risked it, and went for MHRV hoping to achieve a good
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airtightness… we were actually right: a first airtightness test is carried out by Gavin O’Sé of Greenbuild showing that we will be able to achieve less than 1.6 ach, which is quite promising, considering that we are using sash windows in the old part of the house. With this result, we are achieving a specific space heat demand (PHPP) of 20 kWh/m2y, well below the EnerPHit threshold, which is a very satisfactory result for a retrofit.
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I.P.I.A.
Campus Conference Centre Frank Cooney B.Arch MRIAI
Sports Ireland commissioned Cooney Architects in 2013 to investigate the re-use of an existing abandoned concrete structure, and to provide an innovative solution to fulfil the technical brief, while providing an iconic building on the campus to facilitate national, local and Campus wide conference facilities, containing a café and dressing rooms.§v The brief called for a building that would achieve a minimum A3 energy rating; we were required to investigate the broader opportunities for sustainability including reuse of materials (energy, equity, health, beauty, materials, site, water). The completed building consists of a south facing triple height ‘street’ and a north facing, deep plan ‘black box’, which contains the conference room, changing rooms and services.
The Campus Conference Centre is a ‘Hub’ for social and professional interaction. The ‘street’ with its adjacent café and external meeting area are linked vertically to the conference facilities and horizontally to the 22 existing Sports Campus facilities. The internal café space, located on ‘the street’, together with the external sheltered south facing outdoor meeting area, with white brick seats, actively encourage interaction and create collaborative spaces for the campus staff and visitors.
during the summer time. All spaces, excluding the ‘black box’ element, are naturally lit. The two tripleheight, south facing spaces, at either end of ‘the street’ gallery, create natural stack effect ventilators in summer time, the windows at both lower and upper level can be opened and draw air in, acting like a chimney. In winter time they collect solar gain through their large south facing windows and this heat is transferred to the thermally massive core of the building.
This design response evolved from the processes of immersion where we analysed the opportunities presented by site, context, orientation, reuse of existing structural and material elements, solar gain, natural ventilation and embodied energy.
A combination of passive stack effect ventilation and mechanical heat recovery ventilation is used in the conference rooms and changing facilities.
The building fabric is appropriately insulated, cold bridges are eliminated, it is airtight, predominantly south facing and designed to facilitate solar gain
We believe that this process of design and realisation has resulted in a completed building that is healthy, beautiful and appropriate and above all uplifting to the human condition.
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Rochestown
House
by Dún Laoghaire-Rathdown Architects Department
Social Housing refurbished to the EnerPhit Standard
This original complex is owned by Dún Laoghaire-Rathdown County Council and comprises 2 separate blocks built in the 1960s as well as a small terrace of single storey houses.
This block, a 2 storey building of 34 units, mainly bedsits, has undergone a deep retrofit to achieve the EnerPHit standard – the passive house certification standard for existing buildings. This retrofit is also one of a number of projects across Europe taking part in an EU programme called the EuroPHit project, demonstrating how to achieve the EnerPHit standard, using a step-by-step phased approach to retrofitting. The refurbishment of the apartment block was designed by the Dún Laoghaire-Rathdown Architects‘ Department and MosArt Architects provided EnerPHit consultancy and training services. Existing Building The original 1960s 2 storey building was constructed with pre-cast concrete panels with pebble-dash finish and poured concrete internal walls. There was no insulation on walls, roof or floors and there were minimal heating controls. Space and water heating was provided by a central oil boiler located on the roof. Refurbishment The extension and refurbishment of this block included the addition of a third storey along with minor extensions to accommodate an extra escape stairs and lift. As the design set out to eliminate the use of bedsits by turning two bedsits into larger one bed apartments the building still provides 34 units but this was achieved by adding a third floor to the building. The retrofitting of the existing structure involved external wall insulation and fitting Passive House-certified windows. Also the new top level was built comprising walls of aerated concrete block with external insulation and a lightweight metal deck roof. Each apartment has a mechanical ventilation heat recovery unit and a central micro CHP (combined heat and power) system used in tandem with a gas condensing boiler provides all space and hot water heating.
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Challenges External Insulation and Foundations
To reduce thermal bridging at the junction between the existing walls and the ground floor slab, the continuity of insulation was crucial. To minimise heat loss from the uninsulated floor slab, the plan was to continue the insulation down to the top of the strip foundation and around the outer edges of this strip. Once the foundations were exposed, it became clear that this was not possible due to the unevenness of the strip. Thermal modelling was carried out to ensure that the junction detail achieved the building regulation requirement internal surface temperature of 15⁰C while removing the need for the insulation around the outer edges of the foundation.
Airtightness In order to achieve the airtightness standard of 1.0 air changes/hour for EnerPHit certification, the airtightness layer was located on the external face of the existing concrete panel walls. It was originally planned to locate the airtightness layer of the new third floor internally. However, it proved too challenging to connect the external layer with the internal layer so a decision was made to place this externally. This required an external render layer behind the external insulation to ensure a fully airtight layer.
Mechanical Heat Recovery Ventilation (MHRV) The limited floor to ceiling heights of 2.4m, fire protection, general maintenance and emergency shutdowns, access and cost all posed significant challenges for the installation of MVHR in an existing building and many options were explored to determine the most appropriate mechanical ventilation solution. In the end, it was decided to install individual MVHR units in each apartment. This avoided the need for large centralised ducting and ensured acceptable heat recovery efficiencies.
Lessons Learned •
•
•
Air pressurisation testing of an existing building should include an air leakage detection analysis in order to accurately plan a more realistic strategy at the design stage. Preliminary pressurisation testing of the entire building should be programmed in and the contractor must be made aware that temporary sealing may be required to carry out the testing properly. This is challenging mid-construction. It is important to assess the many different retrofit options against the requirements of the end user to ensure the end result is compatible with their needs. www.companyeweb.com www.nzeb-opendoors.ie 1919
A1 Rated House in Dublin by Green Design Build
Tom Duffy of Green Design Build set out to design and build a 3-storey, 100 m2 house on an urban infill site as sustainably and economically while meeting the following aims: • Install high levels of insulation to achieve very low U-values; • Achieve an airtightness result of maximum 0.6 ac/h at 50 Pascals; • Use readily available sustainable materials where possible; • Keep costs to a minimum while exceeding the NZEB standard and achieving an A1 rating.
High levels of insulation 1. Walls: 300mm of external insulation on blockwork, achieving a U-value of 0.08 W/m2K; 2. Floor: 200mm of insulation in the floor slab, achieving a U-value of 0.07 W/m2K; 3. Roof: 200mm of wood fibre insulation and cellulose achieving a U-value of 0.07 W/ m2K; 4. Windows: Windows installed are Munster Joinery triple glazed aluclad.
Airtightness A provisional air tightness test achieved 0.7 ac/h @ 50Pa prior to the floor screed being complete. At this stage, air leakage points were identified around the main floor perimeter and at some open pipes. These works have now been completed and a final airtightness result below 0.5 ac/h is expected. Ventilation The ventilation in the house is provided by mechanical ventilation with heat recovery - Frankische Profi Air 250. Heating System & Renewables Space and water heating will be provided by an air to water heat pump with DHW production programmed for off-peak heating demand periods, prioritising this during the night and mid-day when the heating demand is very low. Photovoltaic panels on the roof will contribute to meeting the electrical load in the house. 20
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Build Costs Building costs are working out at approximately €200,000 inclusive of VAT, utilities & Local Authority charges which is comparable with typical house building costs. BER For dwellings, the Irish NZEB standard, as measured by the SEAI DEAP methodology, will require an energy performance coefficient (EPC) and carbon performance coefficient (CPC) not exceeding 0.302 and 0.305 representing an improvement in energy performance of 70% when compared to a similar house built to 2005 standards - typically achieving an A2 rating. This detached house is achieving an A1 Rating with an EPC and CPC of 0.135 and 0.139 - going way beyond the NZEB standard!
Maderia Oaks
Affordable, Energy Positive, Certified Passive Housing Development at Enniscorthy, Co. Wexford Madeira Oaks is a new housing development of 12 semi-detached certified passive houses built by Michael Bennett & Sons. Previously, they were awarded the prestigious Isover Energy Efficiency Award in 2011 for the most outstanding energy efficient construction project in Ireland for their house in Grange Lough, Rosslare Strand, Co Wexford. One interesting advancement on earlier projects is that the Madeira Oaks houses are energy positive and so are going further than NZEB!
Main Features Building Fabric: Walls:
Ground Floor: Roof: Windows and Doors: Airtightness:
Timber frame insulated with 184mm cellulose and 50 mm mineral wool insulation. U-value = 0.17 W/(m2K). Concrete slab insulated with 230mm extruded polystyrene insulation. U-value = 0.09 W/m2K Timber frame roof trusses insulated with 500mm of cellulose. U-value = 0.07 W/m2K Munster Joinery, Future Proof windows and glazed doors U-value = 0.8 W/m2K 0.44 ac/h @ 50 Pascals
Heating ventilation and renewables: A Nilan Compact P unit provides space and hot water heating and ventilation. With this unit, space heating is supplied through the ventilation system. The estimated cost for space and water heating is estimated to cost in the region of €200 per year. Photovoltaic panels have also been installed which are expected to generate €200 worth of savings on electricity bills. Building NZEB Passive Houses Affordably The key objective of this development was to build certified passive houses as affordable as possible. The key to achieving this was: • Pre-planning the build is vital in achieving NZEB and passive house targets affordably. The energy performance targets must be set at the outset and kept to the forefront of the decision making process over a two-year time period. • Simplicity - Shoalwater Timberframe Ltd., the timber-frame suppliers, MosArt, Passive House Consultants and Bennetts all worked together to simplify the design to keep build costs to a minimum. • Building experience - Michael Bennett & Sons and their team can draw on invaluable experience achieved over the last ten years building to the passive standard. This experience along with the support and expertise of MosArt kept build costs to a minimum. The company aims to construct houses that are not only cost effective to buy, but comfortable in live in, easy to clean, and very convenient in operation. All of these factors are present in the Madeira Oaks houses. 22
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Superhomes
Ireland
SuperHomes Ireland is a ground breaking project designed to help homeowners to upgrade their homes to an A3 BER. The nationwide scheme, developed and administered by Tipperary Energy Agency and funded by SEAI, was piloted on 10 homes in 2015, with feedback from participating homeowners influencing the 2016 scheme design. The scheme offers grant funding to cover up to 35% of the cost of upgrading pre-2006 homes to an A3 BER, with the maximum eligible cost before discounts totalling €26,000 excluding VAT. Homeowners have the option of spreading the remaining cost over five years via a loan. Although an A3 BER is the upgrade target, SuperHomes also includes several mandatory measures that homeowners must complete to avail of financial support. The primary heating system must be renewable – and specifically an air source heat pump or pellet boiler. Advanced ventilation systems must be installed, such as demand controlled mechanical extract ventilation or heat recovery ventilation. Finally, the building’s airtightness must be improved. Other non-mandatory measures, such as insulation, window and door upgrades, biomass stoves and solar PV arrays may be incorporated. The scheme has seen huge numbers applying in 2016. SuperHomes is expected to continue into 2017, and applicants who don’t make the cut in 2016, will be notified about the possibility next year. You can apply on www.superhomes.ie
Superhomes Case Study: House Description: 2 Storey, 215m2, detached home with cavity walls, built in 1989 in Thurles, Co. Tipperary The clients, close to retirement age, wanted a warm, comfortable, healthy home and to protect themselves against rising energy costs and move away from fossil fuels. Pre-works: Heating System: Secondary Heating:
Standard oil boiler (70%) with standard radiators and no controls Open Fire
Upgrade: Attic Insulation: Wall Insulation: Windows: Front Door: Heating System Radiators: Hot Water: Secondary Heating: Ventilation: Photovoltaic Panels: Energy Monitoring:
Results: 300mm rockwool insulation Estimated Payback after the grant amount of €9,000: 8 – 12 years Cavity wall pumped with Bonded bead insulation Fuel cost savings per annum: €1,270 Double glazed U-value 1.2W/m²K Composite Door U-Value 1.2W/m²K 8.5W Air to Water heat pump (SPF: 408%) Low temperature aluminium radiators with TRVs New 200 litre hot water cylinder Soild Fuel Stove with external air supply Demand Control Ventilation System 2kW including immersun unit Energy monitoring kit to ensure system is runs efficiently
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DIT Exhibition of PGCert/MSc NZEB work DIT will be holding an exhibition of the PGCert/ MSc NZEB work in RIAI, 8 Merrion Square, Dublin 2 from 8th - 11th and 14th -18th November from 9.00am 5.00pm.
Events
The exhibition will be formally opened on Tuesday 8th November at 18.00 by Jim Coady, followed by an 18.15-19.00 presentation of each project by the DIT academic team led by Simon McGuinness. On Saturday, 12th November, the exhibition will be open from 11:00 – 13:00 and a DIT academic team will be available to present the work to visitors.
Skiberreen, Co. Cork Tour This event, organised by the Passive House Association of Ireland will include a presentation by Wain Morehead Architects and a tour of this A1 rated, certified passive house in Skibbereen, Co. Cork. This event will take place on Saturday 12th November at 11:00, 12:00 and 13:00
Ecological Building Systems ‘Centre of Knowledge’Atboy, Meath Ecological Building Systems have provided guidance and materials to many low energy, Passivhaus and NZEB buildings throughout Ireland and the UK. Airtightness is a key part to delivering a low energy, durable building. Ecological’s technical team will deliver a “How to attain airtightness” demonstration with pro clima airtightness membranes and seals along with an airtightness air pressure test demonstration at their training centre in Athboy, Co Meath. This event will take place on Friday 11th November from 14:00 - 16:00
Xtratherm Xi Centre, Navan, Meath Xtratherm is delighted to open the doors of its new Innovation Centre as part of this year’s NZEB Open Doors event. The Xtratherm Innovation Centre’s exhibition space and training academy has been developed to assist construction professionals in understanding the principles of specifying and achieving on-site best practice insulation standards. This event will take place on Friday 11th November from 11:00 - 13:00 www.nzeb-opendoors.ie
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Visit a Building 01 Gurteen, Co. Sligo Property Type: Under Construction Category: Self build, Low Energy (>45 kWh/m2/y)
This new timber frame post & beam house features Gutex woodfibre board external insulation, a heat pump, Mechanical Ventilation with heat recovery and rainwater harvesting.
Sun 13th:
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Park Lane, Galway
Delvin Bridge, Ballbriggan
Carton House, Maynooth, Kildare
Property type: New build Category: Passive House Building (not yet certified)
This prefabricated timberframe house two-storey house is equipped with a solar system and PHI certified HRV system and features a maintenance-free ventilated silicate rendered faรงade.
Sun 13th:
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14:00-16:00 16:00-17:30
14:00-17:00
www.nzeb-opendoors.ie
Property Type: Retrofit Category: Low energy building
This 1870s Gate Lodge has been upgraded to an A3 rating (previously a G) and features an air source heat pump, underfloor heating, MVHR and solar thermal.
TBC
See Website
Property Type: Newbuild Category: Nearly Zero Energy Building (<45 kWh/m2/annum)
This large detached house was completed in 2015 and has achieved an A2 Building Energy Rating. The house features solar water heating, a heat pump, MVHR, rainwater harvesting and a wood burning stove. Sat 12th:
12:00-14:00 14:00-15:00
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Bunclody, Enniscorthy, Wexford
Culanor, DĂşn Laoghaire
Carlingford Parade, Macken St, D2
Property Type: Newbuild Category: Certified Passive House Building, NZEB (<45 kWh/m2/annum)
The A1 Rated Passive house in Kiltealy features photovoltaic array and a heat pump. The building has a Zero demand on average annually for its heating and hot water systems .
10:00-11:00 11:00-12:00
Sat 12th:
Property type: New build Category: NZEB (< 45kWh/m2/y)
Property type: New build under construction
By minimising thermal bridging, creating a highly insulated airtight envelope, installing MVHR and Solar PVâ&#x20AC;&#x2122;s these quality built homes are end user focussed and deliver tangible energy savings.
This Dublin city centre infill new build includes a passive raft foundation, super insulated glulam SIP structure and a heat pump with underfloor heating.
08 Co. Longford (Mostrim)
See Website
TBC
Category: NZEB (<45 kWh/m2/annum)
TBC
See Website
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Craughwell Co. Galway
Alexandra Crescent, Baldoyle, D13
Property Type: Newbuild Category: Nearly Zero Energy Building
Property type: New build, Self build Category: Nearly Zero Energy Building
Property type: New Build Sheltered Housing
(<45 kWh/m2/annum)
(<45 kWh/m2/annum)
Category: Passive House Certified
A2 rated self build. Masonry construction with concrete first floor and underfloor heating with geothermal heat pump.
Detached, self build, built to passive house standards, this timber frame house features external wood fibre insulation & cellulose insulation, MVHR and 4kW of PV which will be expanded to make house zero energy.
The 13 new units of sheltered housing built to Passive House standards are estimated to cost only 6% higher than the original conventional build tendered for. This was achieved by heavier insulation and thermal bridge detailing, airtightness work and MVHR.
TBC
See Website
Sat 12th: Sun 13th:
14:00 14:00
TBC
See Website
www.nzeb-opendoors.ie
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Newbridge, Kildare
Dunmore East, Waterford
Glen of The Downs, Bray, Wicklow
Property type: New Build, Self Build, under construction Category: Passive House Building (not yet certified)
This timber frame self build house is designed to the Passive House standard. It features PV for space heating and water heating, a rainwater harvesting system and solar water heating. Site visit not suitable for children. Sat 12th:
9:30 - 11.30
Property type: New build Category: Nearly Zero Energy Building (<45 kWh/m2/annum)
This Passive House property was completed in 2015 with a total floor area of 225 m2 and features solar water heating.
ECO House team of experts delivers an Aâ&#x20AC;?rated homes using passive means and alternative energies and sustainable, low carbon footprint technologies. Their showhouse demonstrates the materials and technologies they use in each build.
Sun 13th:
14:00
Fri 11th: Sat 12th: Sun 13th:
11:00- 17:00 11:00- 17:00 11:00- 17:00
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Salthill, Galway
Senior Citizens Complex, Dublin 3
Portmarnock, Co Dublin
Property type: Retrofit Category: Passive House Building (certified)
Full Passive House retrofit of 142sq m 1970 semi-detached house. The house features MVHR, heat pump feeding thermal store and the use of green materials. The initial F BER rating was improved to an A2. Sat 12th:
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Property type: New Build, Self Build Category: Passive House Building (not yet certified)
14:00-16:00 16:00-17:30
www.nzeb-opendoors.ie
Property type: Retrofit Category: Low Energy Building
Mid 20th Century development involving the amalgamation of bedsits into one bedroom dwellings. The buildingâ&#x20AC;&#x2122;s attic, ground floor and walls were insulated, demand control ventilation was installed with excellent airtightness achieved. Visit not suitable for children. PPE required. Sat 12th:
11:00-13:00
Property type: New build Category: Nearly Zero Energy Building (<45 kWh/m2/annum)
This 330 sqm Nearly Zero Energy House with impressive eco-credentials such as MHRV, rainwater harvesting, wood burning stove and a heat pump.
TBC
See Website
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Cluain Tarbh, Berrings, Cork
Co Longford
Cork IT
Property type: New build Category: Passive House Building (yet to be certified)
Property type: New build Category: Certified Passive House Building
Newbuild (2014) Passivhaus (yet to be certified) with solar PV installation, a wood burning stove with wrap-around boiler, MHRV and solar water heating.
Two-storey timber frame detached house with continuous insulation to the entire envelope. This certified Passive house features decentralised MVHR and a wood burning stove.
Sat 12th: Sun 13th:
11:00-13:00 11:30-13:00
TBC
See Website
Property type: Non-domestic Retrofit Category: Nearly Zero Energy Building
The retrofitted CIT buildings have U-values up to 30 times better than the original building, structural air tightness 8 times better. Now a NET Zero Energy Building with PV meeting the baseline energy demand.
TBC
See Website
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Rochestown, Dublin
Coiste Na Mí GAA Centre, Meath
OPW Headquarters
Property type: Retrofit
Property type: New build Sports Centre Category: Low Energy Building
Property type: New Build Offices
Category: EnerPHit Standard
The extension and retrofit works to this block of 34 apartments include an additional storey, external wall insulation and new windows, MVHR and a central micro CHP with gas condenser boiler provides heat and domestic hot water.
A 1,200 sq.m community, sport, training and administration facility, completed in 2015. This naturally ventilated building has been designed to maximise solar gains and features an air source heat pump and underfloor heating and a highly insulated fabric.
The OPW head office is a 4 storey circular building with a central atrium. The building was designed to be “the best-in-class” in terms of energy efficiency and has an A3 energy rating and is naturally ventilated with passive cooling.
TBC
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See Website
www.nzeb-opendoors.ie
TBC
See Website
Category: Nearly Zero Energy Building
TBC
See Website
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