Wet Underfloor Heating


1.   SCREEDED FLOOR CONSTRUCTIONS


2.   TIMBER SUSPENDED FLOOR CONSTRUCTIONS


3.   FLOATING FLOOR CONSTRUCTIONS


4.   LOW PROFILE FLOOR CONSTRUCTIONS


1.   SCREEDED FLOOR CONSTRUCTIONS

                                                 

ATLAS

The Mercury ‘Atlas’ floor system is a commonly used underfloor heating system that provides a quick, flexible and simple solution for heating within a screed floor. The pipe used is Mercury P16, M16 or P20 depending on the application, this is held in place by staples with a barbed end to fix into the insulation. Clamptrack can be used to provide additional fixing for the pipe when required (recommended when a flow screed is used).


The UFH pipe is laid in continuous loops, typically clipped to PIR/PUR insulation with a vapour control layer over (as per manufacturer guidelines), a perimeter insulation is required around the walls with either insulation upstands or a foam edging. The pipe and manifold should be pressure tested following installation with the floor screed laid shortly after the UFH installation.


AURORA

The Mercury ‘Aurora’ floor system uses castellated panels, each panel easily interlocks with one another to create a fixing system for Mercury P16 or M16 pipe that does not require fixings or staples. This floor system is commonly used as a part of a specified acoustic floor detail within flats and houses where it is laid directly onto the acoustic layer. The UFH pipe can be spaced at 50mm intervals enabling easy installation of 16mm Mercury pipe at 150mm and 200mm centres.


The UFH pipe is laid in continuous loops into the pipe positioning panel, a perimeter insulation is required around the walls with either insulation upstands or a foam edging. The pipe and manifold should be pressure tested following installation with the floor screed laid shortly after the UFH installation.


2.   TIMBER SUSPENDED FLOOR CONSTRUCTIONS

                                                

ELLIPSE

The Mercury ‘Ellipse’ floor system is specifically designed for joisted floor applications and offers a quick response time without raising the floor height. With even heat distribution and high efficiency, Ellipse produces the maximum output possible from a joisted floor system when combined with a high temperature heat source such as a boiler. Ellipse can also be used in conjunction with renewable technologies including ground and air source heat pumps, extra care and attention must be taken to ensure the design temperature and output meets heat loss when using renewables. The pipe used is Mercury P16, M16 or P20 depending on the application, this is held in place by fixing the aluminium heat emission plate to a joist or battened floor above rigid or mineral wool insulation. It is essential for the insulation to be installed as close to the underside of the heat emission plates as possible. Joist or batten centres can be 300mm, 400mm or Junckers Sprung Floors with 411mm centres.


The UFH pipe is laid in to the pre grooved plates in continuous loops, they will follow the floor joist direction and cover approximately 80% of the heated floor area. The pipe and manifold should be pressure tested following installation with the floor deck laid shortly after the UFH installation.


ELARA

The Mercury ‘Elara’ floor system is specifically designed for joisted floor applications. The construction consists of a load bearing slotted 22mm chipboard, which replaces the standard board in floor constructions. Elara offers a quick response time with a minimal increase in floor height; other benefits include efficient and even heat distribution achieving maximum output when combined with an ASHP or boiler. As the UFH pipes are as close to the surface as possible, the resistance is reduced and performance improved against a typical 22mm chipboard construction above the UFH system, the pipe used is Mercury P16 or M16.


The 22mm slotted chipboard is laid across the joists (maximum of 600mm centres), at 90 degrees to the floor joists. This can be temporarily covered for protection if dictated by the type of build. When the build is ready for the UFH, the temporary deck can be removed, the 22mm chipboard cleared of any remaining debris allowing the installation of the supplied aluminium heat emission plates. This is followed by laying the underfloor heating pipes into the plates in continuous loops back to the manifold. There may be a requirement for pipes to drop below the 22mm slotted board to feed back to the manifold. The pipe and manifold should be pressure tested following installation with the floor deck laid shortly after the UFH installation. Following installation please follow the installation or flooring manufacturer instructions for installation, typically a 12mm tongue and groove chipboard or 12mm ply is supplied and laid over the Elara floor system.


3.   FLOATING FLOOR CONSTRUCTIONS

                                                                            

HYPERION

The Mercury ‘Hyperion’ floor system is designed to be installed on solid or timber floors. The sub-floor is required to be flat and level to support the grooved floating floor panels. Hyperion offers a level of thermal insulation and can reduce the weight of the building structure. The pipe used is Mercury P16, M16 or P20 depending on the application.


The grooved floating floor panels are laid onto the sub-floor, aluminium heat emission plates are then laid into the floating floor panel to cover approximately 80% of the heated floor area followed by the pipe in continuous loops prior to the Timber or ScreedBoard deck being installed. If an acoustic layer is required an additional layer can be supplied to be installed beneath the floating floor panels to meet the projects individual requirements. The pipe and manifold should be pressure tested following installation with the floor deck laid shortly after the UFH installation.


4.   LOW PROFILE FLOOR CONSTRUCTIONS

                                               

MINITEC

The advantage of Minitec is its low installation height. Suitable for most room sizes Minitec can be installed on any existing screed, timber or tiled floor.


The Minitec floor system uses castellated panels, each panel has holes manufactured into the panel to enable the levelling compound to spread and bond firmly with the primed substructure. The rear of the panel has an adhesive back to assist in securing the panel to the floor during installation. Self-adhesive edging strip allows for a seal along the walls and the bottom surface.


Mapei Ultralay Renovation Screed is then installed above the raised castellation resulting in a minimum height of just 15mm. After a short drying time the floor coverings can be laid directly to the surface of the levelling screed. As the UFH pipe is just below the top layer, heat-up times are short and the system can be operated at lower water temperatures. The pipe and manifold should be pressure tested prior to the levelling screed being installed.


NEBULA

The Mercury ‘Nebula’ floor system is a low profile underfloor heating system with a depth of 18mm in total including Mercury P12 pipe.


Nebula is designed for underfloor heating situations where floor build up depth is restricted and can be used in both new build and renovation applications.


The Nebula system is designed to be installed over flooring which is flat and level to enable the Nebula insulation to support the floor finishes on top. The insulation is manufactured using EPS250 with a heat distributing foil over, grooved to take Mercury P12 pipe for even heat distribution. The installation is designed to cover the complete floor area, there may be the requirement for battens i.e. to support door thresholds or perimeter insulation. The pipes are laid in a continuous loop back to the underfloor heating manifold where they are pressure tested. Nebula then has a Screedboard or floating timber floor laid over prior to finished flooring being installed.

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