VARICOOL UNI T H E S E A M L E S S H E AT I N G / C O O L I N G CEILING SYSTEM
Our experience, your added value Solutions from Uponor stand for excellent quality and ensure easy integration into the construction process. and education projects, production plants and airports. We support architects, engineers and end user clients with feasibility through to construction and handover.
We provide safe and efficient installation technologies for heating/cooling and for the installation of potable water which guarantee the long-term, sustainable and trouble free operation of your building – all at low maintenance costs.
The solutions for building temperature control, energy supply and energy distribution ensure the most comfortable climate in living and work areas. They also optimise costs and contribute to reducing energy consumption and CO2 emissions for sustaining a comfortable living environment.
Energy-efficient and sustainable solutions High comfort for an optimum working environment Easy integration of the systems into the building process High reliability and low maintenance costs Technical support starting with the initial design up to installation and building completion
You will receive an energy-efficient building tailored to your needs with virtually no maintenance and low operating costs – a building that o ers its users an optimum and comfortable working environment all year round.
1. Feasibility analysis
4. Installation and project management
Based on the customer's individual requirements in terms of efficiency, sustainability and energy efficiency, we provide targeted advice with respect to the most appropriate solutions for a building.
2. Solutions and concepts
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5. Commissioning and handover
Using advanced engineering so ware, we develop design proposals according to customer needs, taking into account the specific circumstances.
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We support your project team in planning, organization and in the management of resources. In close cooperation with neighbouring trades we provide for an optimum flow of materials and efficient and trouble-free installation.
The systems undergo extensive testing and are commissioned by us before they are handed over to you.
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3. Technical planning
6. Customer services
We transform ideas into technical implementation, taking into account all relevant data and the applicable standards. Our Uponor planning experts, who manage your specific project, have many years of experience.
To ensure long-term system availability, we er professional inspections and maintenance along with quality control using modern testing techniques, such as thermographs, flow measurements and water quality analysis.
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VARICOOL UNI
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All legal and technical information was compiled to the best of our knowledge and with utmost care. Nevertheless, errors cannot be completely excluded and liability for damage resulting is not assumed. This document and all of its parts are protected under copyright laws. Any use beyond those exceptions authorized by the copyright law is not permitted without the consent of the Uponor GmbH. All rights reserved in particular with regard to reproduction, reprinting, editing, storage, processing in electronic systems, translation and microfilming. This document is subject to technical changes without notice. Copyright 2012 Uponor GmbH, Hassfurt, Germany
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
VARICOOL UNI – The seamless heating/cooling ceiling system System description and applications Your benefits
VARICOOL UNI plasterboard-heating/cooling ceiling system elegantly adapted to the architecture and light blanket.
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VARICOOL UNI is a water-based heating/cooling ceiling system that operates primarily according to the radiation principle and is characterized by a variety of application and design options.
provides a pleasant atmosphere and excellent room acoustics. Lighting elements and other components, such as speakers, sprinklers, etc., can be integrated in the ceiling.
With this design, jointless and directionless ceiling surfaces can be created for special architectural requirements. With its consistent functionality the design can be adapted to meet the needs of flexible room design and difficult geometries. The heating/cooling ceiling system VARICOOL UNI
Due to the special design principle, mounting profiles for ceiling panels in the active cooling area are not required. Therefore, in comparison to other gypsum ceiling cooling systems, a larger activatable ceiling surface and room area-based cooling and heating capacity is possible.
Joint and directionless ceiling surfaces for special architectural requirements High heating and cooling capacity through full activation of the ceiling surfaces High sound absorption coefficients by eliminating thermally inactive construction elements Risk-free subsequent attachment of surface mounted parts through protected pipe guidance in the heat conducting profiles Ideally suited for renewable energy sources such as geothermal energy and heat pumps Suitable for user-based energy consumption measurements No draught and no noise Integration of lighting, air vents, fire alarm systems, sprinklers, speakers etc. possible
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Design Structure of the heating/ cooling coils The factory installed heating/ cooling coils are made of highquality, machine-made copper serpentine pipework which is pressed into aluminium heat conducting profiles and fixed with stabilizer bars.
Heating/cooling ceiling system VARICOOL UNI with perforated plaster/thermoboard lined with black acoustic fleece
Systems compared System VARICOOL UNI Through the special design of the heating/cooling coil system VARICOOL UNI, a high specific heating and cooling capacity (relative to the entire ceiling is attainable, since a full-scale activation of the ceiling area excluding fixtures) is possible.
System VARICOOL UNI Nominal cooling capacity according to EN 14240 at 8 K undertemperature = 58 W/m² (RA 90 mm) Theoretically activatable ceiling area = 100 % Cooling capacity at 8 K undertemperature = 58 W/m²
Standard system of other manufacturers with additional CD profiles In standard systems, additional inactive CD profiles are installed to fasten the ceiling panel. These additional CD profiles lead to a reduction of the activatable ceiling area and capacity.
Standard system with additional CD profiles Nominal cooling capacity according to EN 14240 at 8 K undertemperature = 58 W/m² (RA 90 mm) Theoretically activatable ceiling area = 80 % Cooling capacity at 8 K undertemperature = 46 W/m²
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Ceiling panel with plaster/thermoboard The plaster/thermoboards are designed especially for use with ceiling or wall cooling and heating systems. Their special material properties ensure optimum heat transfer. Because of the good thermal conductivity optimum surface area-related capacity values can be achieved. The boards are non-combustible and fall under building material class A2. They can be efficiently processed with the conventional drywall construction tools. In addition to the plaster/thermoboards described, other variations of ceiling lining can be used for customized panelling of the heating/cooling coils. Surface treatment Various options are available for the finishing of visible surfaces including: filling of the joints and terminations for different levels of quality or painting with opaque latex paint. For acoustically effective surfaces with hidden perforation, open pore special paints and an additional protection against air flow are required. The use of acoustic plasters reduces the
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capacity of the chilled ceiling. The boards are primed before applying paint or a coating. We recommend the following coatings: Paint Wash and scrub resistant synthetic latex paint Oil paint Matt lacquer paint Alkyd resin paint Polymer resin paint Polyurethane paint (PUR) Wall paper Paper, textile and synthetic wallpaper
requirements. This includes filling the joints and the concealment of fastening elements. Quality Level 2 (Q2) – corresponds to standard quality and meets the normal requirements for wall and ceiling surfaces with medium to coarse-textured wall coverings or matt filling paints and top coats. Quality Level 3 (Q3) – increased demands on the filled surface. Quality Level 4 (Q4) – highest demands on the filled surface.
Plasters Mineral-based acoustic plaster for excellent acoustics – System VARICOOL UNI finery (carrier fleece laminated to perforated ceiling panels – perforation is therefore not visible) Surface qualities Proper surface finishing is regulated according to DIN 18180 and includes the following levels: Quality Level 1 (Q1) – a basic filling (Q1) is sufficient for surfaces with no special
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Perforation The ceiling panels are available random to regular to staggered or square. Bespoke perforations are available upon request. Perforated ceiling panels come complete withacoustic fleece as standard. If concealed perforations arerequired, the system VARICOOL UNI finery is used. The perforated ceiling panels then receive a final acoustic paint coating in combination with a special carrier fleece. An additional flow blocker is installed to prevent perforation pattern edges.
Sound absorption cooling/heating ceilings with plasterboard lining: Ceiling panel with visible perforation Ceiling panel with hidden perforation through acoustic paint coating The selected perforation pattern
The sound absorption values move into the high frequency range at suspension heights less than 120 mm (special case). Greater suspension heights, however, lead to an increase of the sound frequency range. There is only a slight change in the values once the air cavity reaches 500 mm.
performance of the ceiling panels. The highest sound absorption a perforation percentage between 10 and 20 %.
Examples of perforation patterns (not to scale) Regular perforation on the right 8/18
on the right 15/30
Staggered perforation on the right 12-20/66
Random perforation on the right 12-20-35
Regular square perforation on the right 12/25Q
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Application examples for VARICOOL UNI heating/cooling ceilings
VARICOOL UNI heating/cooling ceiling system in a museum building
Heating/cooling ceiling in combination with a separately cooled light blanket
Cooling/heating ceiling prior to panelling with thermoboards
Finished heating/cooling ceiling in slightly curved design (special design)
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Special coatings for exceptional interior design
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Planning and dimensioning The heat transfer in closed, flat chilled ceilings under the test conditions according to EN 14240 (closed test chamber, evenly distributed heat sources, adiabatic boundary surfaces) is characterized largely by radiative heat exchange with the surrounding surfaces and heat sources as well as convection on the bottom side of the cooling ceiling. The conditions specified in the norm test represent the worst-case scenario. Under practical operating conditions a higher surface arearelated cooling capacity is achieved.
conditions or realistic installation conditions can be taken from diagram 1. The capacity is read as a
function of the temperature difference between the mean water temperature and the room temperature.
Diagram 1: Heating/cooling capacity system VARICOOL UNI tested according to EN 14240 and EN 14037 Surface area-related capacity [W/m2]
Cooling/heating capacity
150 The cooling capacity is reduced by about 7 % when the pipe spacing is increased by 10 mm.
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Capacity values for the system VARICOOL University finery (acoustical plaster) are approximately 10 % and 7 % less in cooling and heating mode respectively.
110
90
70
50
30
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The approximate cooling and heating values under standard
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Temperature difference [K]
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20
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(mean water temperature to room temperature) Nominal cooling capacity RA 90 Nominal cooling capacity RA 110 Nominal cooling capacity RA 130
Nominal cooling capacity RA 90 Nominal cooling capacity RA 110 Nominal cooling capacity RA 130
Areas of capacity increase under actual installation conditions: Area of capacity increase 22 % (36 °C warm façade and 30 mm edge joint) Area of capacity increase 20% (ventilation control, air movement from ceiling to floor)
Sound absorption
Sound absorption coefficient αS
Diagram 2: Sound absorption system VARICOOL UNI and uni finery tested according to EN ISO 354
Perforated plasterboard ceiling panels are used with an acoustic fleece for meeting acoustic system requirements.
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 125
250
500
1000
2000
Frequency f [Hz] VARICOOL Uni, with visible perforation VARICOOL Uni finery with hidden perforation
αw = 0.5 (sound absorption class D) αw = 0.4 (sound absorption class D)
Pipe spacing 110 mm, suspension height 300 mm, without mineral wool liner, Coverage rate = 100 %, weighted sound absorption coefficient αw according to EN ISO 11654
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The sound absorption values of the systems with visible perforated ceiling panel (VARICOOL UNI) and covered perforated ceiling panel (VARICOOL UNI finery) are listed in diagram 2 as a sound absorption coefficient αS. The weighted sound absorption coefficient αW was calculated according to EN ISO 11654. A suitable mineral wool liner (approx. 30 mm, 44 kg/m³) and a reduced coverage rate from fixtures (lamps, etc.) improve the weighted sound absorption coefficient αW by 0.05. 9
Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Lighting All types of lights can be installed in the construction phase and in planned recesses. Another variant is mounted lights or a suspended lighting fixture.
System QUELLO The ceiling system VARICOOL UNI can be combined with the air displacement diffuser QUELLO which is not visible from the room. See also the detailed product information QUELLO.
hydraulic connection of the water circuits to the heating and cooling network is shown below for a two-and four-conductor network.
Air displacement diffuser System QUELLO
The shut-off valves form the separation point between the cooling ceiling and the supply lines. We recommend the installation of a combination valve (2) in each loop for adjusting the required nominal water flow. In addition, each loop is also equipped with a closable ventilation device (3).
The number of coils that can be connected together in a water circuit is based on the pressure loss of the water volume required to discharge the cooling load. We recommend not exceeding the range of 15 to 25 kP Usually several water circuits are combined into a control zone, which then forms a loop.
Fire protection The ceiling panels used in drywall construction are based on the natural product of gypsum. These boards are light weight and extremely resistant to fire. The protective effect is produced by the gypsum bound crystal water, which evaporates during a fire and forms a protective vapour curtain on the side facing the fire. The water vapour that emerges prevents the temperature on the surface of the ceiling from exceeding 100 °C for as long as the vapour forms.
Inspection openings must be provided for cleaning purposes according to VDI 6022. Connection to the heating and cooling network
Room ventilation Air exchange outlets are integrated into the ceiling to ensure that the minimum amount of air is exchanged for proper room air hygiene. The System QUELLO is not visible from the room. The supply air is blown-into the room draughtfree via a junction box, air supply rails installed between the heat conducting profiles, and through he perforations in the ceiling.
The coils are delivered ready for connection with stabilizer bars for transport and installation. The RL
Connection diagram room heating/ cooling areas in twoconductor network
VL 2
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1 Shut-off valve 2 Motor operated combination valve 3 Shut-off valve with drain
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RLH VLH RLK VLK
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Connection diagram room heating/ cooling areas in fourconductor network
2 1
2
2 Motor operated combination valve
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3 3
1 Shut-off valve
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3 Shut-off valve with drain 4 Motor operated shut-off valve
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Assembly The heating/cooling ceiling is assembled in a series of steps: Substructure Coil assembly Hydraulic connection Filling and ventilation Pressure check Screwing-on the ceiling panel Filling-in the joints and screw feeders and final surface finishing Openings for lamps or air outlets must be prepared in the ceiling surface through adaptations to the
grid in accordance with the required thermally active ceiling area. Inactive areas are installed as usual with standard CD profiles at a distance of approx. 30 cm (fine grid). The construction forms an even level plane for screwing-on the ceiling panel of thermally enhanced plasterboard (thermoboards). Thermally active and inactive ceiling surfaces can be combined arbitrarily.
substructure. A reinforcing structure is provided for additional installation loads. Installation of the substructure and heating/cooling coils The substructure consists of a parallel arrangement of C-ceiling steel profiles (CD profiles) which are suspended on Nonius hangers under rigid pressure from the concrete ceiling. The profile spacing is approximately 800 mm -1,000 mm. The heating/cooling coils are fixed with quick connectors to the rough
Cross section through the ceiling, ceiling panel made of thermally enhanced plasterboard
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1 Ceiling panel 3
2 CD profiles for inactive ceiling area
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6 1
3 CD profile as rough grid 4 U-mounting rail as serpentine pipework carrier 5 Copper serpentine pipework da = 10 mm 6 Heat-conducting profile
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Ceiling panel installation The ceiling panel is fastened directly on the heat-conducting profile with special quick-wall screws. The special positioning of the pipe prevents it from being damaged during assembly of the
ceiling panel. An optimum heatconductive connection results by attaching the ceiling panel directly on the cooling coil.
Important The system must be filled, vented and pressurized before mounting the ceiling panel.
VARICOOL UNI longitudinal cut 1 Copper serpentine pipework
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2 U-mounting rail 3 Nonius hanger 4 CD profile as rough grid 5 Heat-conducting profile with copper pipe 6 Ceiling panel
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4
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5 6
VARICOOL UNI cross section 1 CD profile as rough grid 2 Heat-conducting profile with copper pipe 4
3 Special cross-connector for mounting the coil on the CD profiles 4 Nonius hanger 5 U-mounting rail 6 Ceiling panel
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5 2 6 VARICOOL UNI ceiling panel, top view
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Wall connection and expansion joints Wall connections There are two variants of mounted wall connections; the simple wall bracket or the step bracket. (see detail 1) A sliding wall connection is made by forming a hairline joint for an optically closed ceiling surface. (see detail 2, 3) By using a simple wall bracket, a rear ventilated shadow gap/ventilated gap (see detail 4) or a closed shadow
gap can be formed. (see detail 5) A border edge can be constructed for ceiling islands. This is created with a glued-on V groove. (see detail 6) Expansion joints in heating ceilings Expansion joints are required for areas ≥ 50 m² or side lengths > 7,5 m.
Note Wall connections and expansion joints must be constructed as specified by the ceiling panel manufacturer.
Smaller areas can be connected together without the use of expansion joints.
Expansion joints in cooling ceilings Expansion joints are required for areas ≥ 100 m² or side lengths > 15 m.
Detail 1: integrated blind rail, wall connection with shadow gap
Simple step bracket
Blind rail
Detail 2: offset board, flush with the wall
Filler and separating strips
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, plasterboard > VARICOOL UNI
Cross-connector for connecting the CD profiles
Copper serpentine pipework
Wall bracket
Special synthetic rapid Filler and CD profile connector for mounting the coil on the CD profiles separating strips Detail 3: Wall box design, flush with the wall
Heat-conducting profile
Board joint
Detail 4: ventilated shadow gap
Wall bracket mounted
Inactive area
Active area
Detail 5: transition from active/inactive area with closed shadow gap
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Glued-on V groove
CD profile
Detail 6: ceiling island with surrounding edge construction
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Building temperature control > Heating and cooling ceilings > Heating and cooling ceilings, metal > VARICOOL UNI
Building temperature control, energy supply and power generation with Uponor Energy Solutions everything under one-roof Building temperature control
Energy supply
Power generation
Uponor surface systems, such as heating and cooling ceilings and concrete core temperature control are established technologies for regulating room temperature and have been a market leader for more than 50 years. The numerous technical developments have made us a pioneer in the field of advanced building system technology.
For commercial buildings, we have pump, as a ready for connection power station with its own integrated hydraulic system: The multifunctional heat pump simultaneously produces heating and cooling energy as needed and is manufactured according to individual requirements in modular design ready for connection.
As an ideal basis for the sustainable, ecological and highly economical supply of commercial properties with thermal energy, Uponor have many years of know-how in the use of geothermal probes, energy piles, ground heat collectors and geothermal groundwater wells.
Building temperature control
Heating and cooling ceilings
Thermally Active Building System
VARICOOL
TABS
Miscellaneous systems
Metal
COMPACTLINE chilled beams
VARICOOL Spectra
TENNO heating/cooling walls QUELLO air vents
Gypsum board VARICOOL UNI
High performance VARICOOL Opti Y VARICOOL Softline 4
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Energy supply
GEOZENT
Energy gain
Geothermal probes
Ceiling elements
Energy piles
VARICOOL Velum
Geothermal collectors
VARICOOL Spectra
Geothermal ground well
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Uponor Limited The Pavilion Blackmoor Lane Watford Hertfordshire WD18 8GA T F E W
01923 927000 01923 223760 enquiries.uk@uponor.com www.uponor.co.uk