Instructions / Assembly

36
My floor does
not get up to
temperature
4. The heating system may be uninsulated. If the
heater has not been installed over a layer of
Warmup Insulation Boards, it will be actively
heating the subfloor as well as the floor
finish. The warm up period of the floor will
therefore be slower as the system is heating
a much greater mass. It could take several
hours if it is installed directly on a thick layer of
uninsulated concrete.
If your thermostat has an optimised start feature,
ensure it is enabled so that the thermostat can
compensate for the mass of the floor. If your
thermostat does not have an optimised start
feature, measure the time taken for the floor to
warm up and adjust the heating start time to
compensate.
5. The heat output of the installed system may
not be suicient. The system will require a
power output of approximately 0.93W/ (10W/
m) for every degree warmer you require the
floor to be than the air. This is in addition to
any heat loss downwards through the subfloor.
If the room air temperature is also lower than
desired, supplementary heating may be required to
overcome the room heat losses.
If access is available to the underside of the
subfloor, installing insulation within the floor will
reduce the amount of heat lost through the floor.
6. Floor coverings such as carpets, underlays
and wood floors are thermally resistive
and will reduce the achievable floor surface
temperature. They may also require the floor
sensor to be recalibrated.
Floor finish combinations with a thermal resistance
of more than 1.5 tog are not recommended and we
recommend that you look to fit a less resistive floor
finish. Floor finish combinations with a thermal
resistance of more than 2.5 tog are not permitted.
Performance Troubleshooting
I am getting
patchy heat
across my floor
1. If the subfloor varies across the floor, the
amount of heat absorbed by it and lost through
it will aect the floor surface temperatures
dierently above each case.
2. If the floor covering over the underfloor
heating changes, each floor finishes
characteristics will aect the warm up period
and the achievable surface temperature.
3. Hot water pipes under the floor could cause
parts of the floor to seem warmer than others.
4. Irregularly spaced cables will cause the floor
to be warmer above the closer cables and cooler
where the cables are spaced further apart.