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Case Study Achieving Part L compliance with natural gas A gas boiler and solar thermal renewable solution, just one of the many ways of complying with Part L using natural gas. A worked solution for simple entry into the DEAP software for BER Certification. BER Requirements
Achieved
10kWh per m2/year Thermal Renewable Energy
18.81kWh/y
<0.4 Energy Performance Coefficient
<0.389
<0.46 Carbon Performance Coefficient
<0.357
90% Boiler Efficiency
91.0%
Compliant with U-Value Specifications
Yes
BER A Rating
“A”
Ros Mór development, Ballyneety, Co. Limerick.
Natural Gas and Part L Compliance
A clear example of modern
Natural gas with a solar thermal solution satisfies Part L by combining a condensing gas boiler with a solar enhanced hot water and heating system.
meeting all Part L
Installed using traditional construction and plumbing methods, this means the on-site plumber can install the system without having to employ the services of any third party specialist fitters. This system is modular in its design and can be altered accordingly to allow for any future changes in the Building Regulations during construction. It is one of the most economical solutions on the market ensuring the developer complies with Part L and at the same time, obtains value for money.
building techniques easily requirements.
Case Study
Ros Mór meets all Part L requirements using natural gas
(“Best Renewable Energy Product” – SEAI 2014 Energy Show).
Best Renewable Energy Product at the SEAI 2014 Energy Show This system, integrated with natural gas, further increases the energy efficiency of your development by delivering free solar energy into the house, providing both space heating and hot water. Combining a natural gas boiler with this renewable technology completes the picture ensuring an instant, efficient, cost-effective ‘A’ rated solution.
An award winning solar enhanced system that delivers up to 70% of hot water.
The following input values are used in this example Building Fabric: Compliant with U-Value Requirements Floor: 125mm of PIR insulation Walls: Full fill bead cavity wall insulation Roof: 300mm of mineral wool insulation Windows: Double-glazed windows
U-Value of 0.14 W/m2.K U-Value of 0.21 W/m2.K U-Value of 0.13 W/m2.K U-Value of 1.42 W/m2.K
Heating System: ≥90% efficient boiler Main Heating System 91.0% efficient gas fired condensing boiler with standard size radiators. This means the heating system is installed using traditional elements, thus there is no need for the use of expensive aluminium radiators. Heating Controls and Water Storage Time and temperature zone controls are achieved by a simple time-clock and thermostats within the system. This in conjunction with a 300 litre stainless steel water cylinder (including 160 litres of dedicated solar hot water storage), makes this solution one of the most economical systems on the market. Solar Space Heating The fan-assisted SmartRad in a common area provides free solar thermal energy reducing the space heating load and at the same time contributes to the renewable thermal heat requirement. Secondary heating System Natural gas fire in the living room is considered a secondary heating system.
Ventilation: Natural Ventilation throughout the house The windows are equipped with window vents and all wet rooms include a fan. Current air tightness testing method determined air filtration to be just over 0.25 air changes per hour of floor area.
Renewable Energy Contribution: 10 kWh Thermal Renewable Energy per metre squared per year.
System Features •
91.0% efficient boiler
•
3 solar thermal panels of 2.5m2 each
•
300 litre stainless steel water cylinder
•
SmartRad with fan coil operation
The houses in this development have varying orientations. For properties facing south & south-east/west, three flat plate collectors are required. For houses facing east/ west, four flat plate collectors are required. Ros Mór easily complies with the thermal renewable energy contribution requirement of 10 kWh per metre squared per year with a thermal equivalent of 18.81 kWh per metre squared per year.
Performance Coefficients: Carbon Performance Coefficient (CPC) <0.46 Energy Performance Coefficient (EPC) <0.4 Natural gas as the primary heating system combined with other renewable technologies comfortably meets Part L Building requirements for EPC <0.4 and CPC <0.46. In this development values of 0.357 for CPC and 0.389 for EPC were achieved.
Combined Heat & Power for Industry
Reasons why BER assessors, developers & consultants should choose this energy solution: Ease of entry in the DEAP software When determining the Building Energy Rating (BER) of a new house the entry of a natural gas system with solar thermal panels is a tried and tested method which only requires simple user inputs in the DEAP. Gas Networks Ireland and NuTech Renewables Ltd have worked with many BER assessors, demonstrating the ease of entering this system into the DEAP software.
Solar Thermal Panels
As previously mentioned natural gas as a primary heating system when used in conjunction with renewable technologies easily satisfies all Part L requirements.
Unique selling points for the builder: Joining the gas network: There are currently over 640,000 domestic gas users on the natural gas network in 19 counties around Ireland. Running costs: This system contributes up to 70% of all hot water requirements and also contributes to space heating. This means the running costs for the homeowner are considerably less than that of older more traditional space heating hot water installations. Apart from the obvious environmental benefits, the builder leaves a fantastic legacy product for the buyer. User-friendliness and aesthetics: This Part L compliant solution incorporates a user-friendly solar control panel. This control panel has two simple settings, Summer & Winter mode, allowing the homeowners to easily select their chosen heating controls for the specific time of year.
Water Cylinder & Pumping Station
The aesthetic of the Gas Networks Ireland/NuTech combination is far superior to other energy solutions. Just like a traditional gas boiler, the elements of the NuTech solution installed in the house are unobtrusive and compact. There are no aesthetically displeasing units in the garden or in direct view of any prospective home-owner. Life cycle and maintenance: Servicing a gas boiler is a simple process which is performed on an annual basis by one of the many 2,500 Registered Gas Installers (RGIs) around Ireland, traditionally ensuring a prolonged life cycle of 20-25 years. Other heating systems are not as easily maintained and can cost up to four times more to service. The life expectancy of other heating systems can in some instances be half that of the traditional gas boiler. In addition to this, unexpected replacement of parts can be costly and can cause undue hardship on the future home-owner.
Gas Cooking
The system can increase your renewable
Contact us for the XML files and manufacturers specifications of this worked example.
energy contribution up
Renewable Supplier
to four times more than
Bill Quigley
other systems
NuTech Renewables Ltd., PO Box 8008, Glenageary. Tel: 01 663 6372 Email: info@nutechrenewables.com Website: www.nutechrenewables.com
The contact details for Gas Networks Ireland are: Networks Services Centre, St. Margaret’s Road, Finglas, Dublin 11, D11 Y895. General Enquiries:
1850 200 694
24hr Emergency Service:
1850 20 50 50
info@gasnetworks.ie gasnetworks.ie
Developer Jana Developments Ltd., 113 North Main Street, Wexford. Tel: 087 255 1477 Gas Boiler Supplier C&F Quadrant Ltd., Unit L40, Cherry Orchard Industrial Estate, Dublin 10. Tel: +353-1-630 5757 Fax: +353-1-630 5715 Email: sales@cfquadrant.ie
39865/1/2017
This information is only a guideline to the different products available for use with natural gas in new development construction. Users should ensure that products are suitable for the specific circumstances in which they seek to apply them. Contact the supplier or manufacturer directly for specific information on building requirements and materials needed for installation. Professional advice specific to the project should always be sought. The current Irish Gas Standards and Technical Guidance Documents (Building Regulations) override all contents. Users should ensure they always have the most up to date information.