Under Floor Heating

With an underfloor heating system, the floor becomes the heat emitter with the heating of the room from the floor up. Unlike radiators in a normal central heating system where the emitters are mounted on the wall the room is effectively heated from the ceiling down. The installation of both electric and water based underfloor heating systems are available, the practicalities of the installation are almost identical apart from obviously, that one uses electric heating cable while the other circulates heated water through the pipe.

Water-based UFH uses water heated to a lower temperature than conventional water central heating (typically 50°C rather than 60°C plus), which makes it ideal for use with high efficiency condensing boilers. The lower operating temperature also makes it more suitable for use with heat pumps or solar water heaters.

The water temperature to the heating pipe is controlled by mixing the water in the pipe with hot water from the boiler to achieve the required temperature. This is then passed to a manifold for distribution to the various zones. Normally an existing conventional boiler will suit UFH, however, it may be necessary to fit a higher rated pump as the back pressure may be greater than in a conventional radiator type central heating system.

Whichever system is used, the heat source is located under the floor and the area to be heated is separated into separate zones (normally one zone per room) and each zone is heated and controlled independently

The 'benefits' of underfloor heating

  •   Water based UFH is cheaper to run than central heating using radiators, as the water used is at a lower temperature (typically 50°C rather than 60°C plus).
  •   The same level of comfort is achieved with the temperature in an UFH heated room about 2°C lower than in a room heated with conventional radiators. Wall mounted radiators act as convectors to heat the air, with underfloor heating, the whole floor area acts as an emitter for radiated heat.
  •   Unlike conventional radiators or heaters there are no hazardous wall projections or hot surfaces
  •   With no need for wall mounted emitters, there is less restriction on placing furniture in the room also fewer 'dust traps' so rooms are easier to keep dust free.
  •   In wet areas; bath, shower rooms, kitchen, etc, the floors will dry off quicker.

The 'drawbacks' of underfloor heating

  •   One of the biggest drawbacks is the relatively slow response time of underfloor heating, especially where the pipe/cable is embedded in a solid floor. A wooden floor can take 30 minutes to an hour to warm up while concrete can take several hours - however the cooling time is also similarly long. This may not be considered a drawback if the property is occupied continuously or if the UFH is just used as 'background' heating.
  •   Underfloor heating should not be fitted under floor mounted units, which is quite easy to arrange in a kitchen where the position of base units etc are fixed.

Retrofit Under Floor Heating

The LoPro range offers the very best low profile UFH solutions, suitable for a wide range of projects including renovations, extensions, loft conversions and bathrooms.

LoPro Max is a wet system that uses a castellated panel to hold the UFH tube in place before pouring self-levelling compound.

One of the highest heat outputs available together with outstanding response times make LoPro Max a perfect replacement for a radiator system. Its low height build-up – averaging just 22mm – allows LoPro Max to be laid on top of existing floors, ideal for running from old rooms to new extensions.

LoPro Max benefits:

  •   Outstanding thermal conductivity – heat outputs up to 120W/m2.
  •   Super-fast response time – can be timed and run as you would a traditional radiator system.
  •   Just 22mm average height increase over existing floor level.
  •   Laid over an existing floor with minimal disruption.
  •   Simple and quick to install.
  •   High structural and compressive strength.
  •   One-third of the running cost of electric UFH.
  •   Range of thermostat options – including wireless.
  •   Perfectly level surface for tiling.
  •   Floor coverings can be fitted after 72 hours.

LoPro 10 is a dry system that uses specialist Knauf pre-routed gypsum panels laid over the existing floor to hold the UFH tube in place. Unlike traditional UFH systems, you won't have to wait for a thick screed to dry and can fit your chosen floor covering immediately.

This is Nu-Heat's lowest profile solution – at just 15mm in total it's no taller than a 5p coin!

LoPro 10 benefits

  •   Standard 15mm depth before floor coverings are fitted.
  •   10mm ultra flexible PEX-c pipework is easily laid in the panels in lengths of up to 60m.
  •   Provides airborne acoustic reduction on timber upper floors by adding mass –15.5kg/m2.
  •   Fixing system enables 10mm PEX-c to be closely laid up to 10 abreast, enabling easy run back to the manifold.
  •   Integrates with the existing heating system.
  •   Can be used on ground and upper floors of the building.
  •   Dense rigid thermal gypsum board can be tiled on directly with just a thin de-coupling layer.
  •   Can be used with carpet and underlay, vinyl and linoleum.
  •   Laminates and engineered floors can be floated directly over the panel

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