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Hep20 Technical Handbook

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Introduction<br />

Underfloor heating provides a<br />

comfortable, highly energy efficient<br />

type of heating. It delivers an<br />

invisible warmth, with no unsightly<br />

heat emitters compromising the<br />

building layout. Allowing maximum<br />

usable area within the building, it is<br />

ideal for both renovation and new<br />

build methods of construction.<br />

This may include the heating of a<br />

conservatory, a one room<br />

extension, domestic or commercial<br />

applications. It is also ideally<br />

suited for the high-ceilinged<br />

spaces encountered in churches<br />

and atriums.<br />

A modern underfloor heating system<br />

consists of continuous plastic pipe<br />

circuits buried in a concrete screed<br />

or run below a timber floor system,<br />

either floating or suspended. The<br />

Hep 2 O ® underfloor heating system<br />

utilises low temperature hot water,<br />

typically 40-55ºC, unlike conventional<br />

heating methods such as radiators or<br />

convectors.<br />

See Figure 13 for a typical domestic<br />

underfloor heating layout.<br />

Material<br />

Hep 2 O ® Underfloor Heating Pipe is<br />

manufactured principally from<br />

polybutylene (PB), a high quality<br />

engineering polymer, designed<br />

specifically for use as a flexible<br />

plumbing material. The highly<br />

flexible nature of polybutylene<br />

means it is the ideal material for an<br />

underfloor heating installation,<br />

allowing the installer to form pipe<br />

circuits with ease, without the need<br />

for preliminary tempering or prewarming<br />

as with other materials.<br />

Hep 2 O ® Underfloor Heating Pipe is<br />

supplied in 16mm and 20mm<br />

diameter Straight Coils, and a variety<br />

of lengths, enabling the installation of<br />

long continuous circuits with minimal<br />

pipe wastage.<br />

Hep 2 O ® Underfloor Heating Pipe is<br />

corrosion resistant and unaffected<br />

by corrosion inhibitors when used<br />

in accordance with manufacturer’s<br />

recommendations.<br />

Benefits<br />

The major benefit of an underfloor<br />

heating system to the end user is<br />

the comfort level provided.<br />

Underfloor heating gives an even<br />

warmth across the entire room<br />

from the floor upwards. Optimum,<br />

individual comfort in these<br />

conditions is achieved when the<br />

feet are a few degrees warmer than<br />

the head.<br />

Hep 2 O ® Underfloor Heating Pipe is<br />

designed for use in underfloor<br />

central heating systems. It is<br />

supplied with an oxygen diffusion<br />

barrier offering maximum<br />

protection against oxygen ingress.<br />

The design of the barrier within the<br />

wall of the pipe offers significant<br />

advantages over underfloor pipes<br />

with an external coating.<br />

Figure 13<br />

Typical domestic underfloor heating layout<br />

Hep 2 O ® underfloor heating manifold<br />

Laying Hep 2 O ® pipe<br />

57

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