See how LoPro®Max is installed

New LoPro®Max is different to all the other retrofit underfloor heating (UFH) solutions on the market. Our Product Development Team spent months researching and testing the product to offer a system that really does respond as quickly to a radiator and that can easily reach a heat output that’s 50% higher than other standard retrofit systems.

One of the key differences of LoPro®Max to all the other systems out there is that it’s a wet solution that uses our specialist self-levelling compound, LoPro®QuickSet. The system utilises a robust castellated panel to hold the tube, simply laid over the existing floor. Once the tube is installed and the system has been pressure tested, the compound is mixed and poured.

We’ve had feedback from installers, and they have all been impressed with how simple the system is to install – right up to finishing the compound stage.

See how LoPro®Max is installed in this step-by-step video:


Introducing fully designed LoPro®Max – the ultimate UFH solution for renovations

LoProMax being installed in a kitchen

Virtually any home can now enjoy the benefits of warm water underfloor heating thanks to LoPro®Max, an innovative new UFH system specifically developed by Nu-Heat for renovation projects.

Older properties, those being extended or renovated, and even those with lowers levels of insulation are now able to upgrade to an efficient, invisible heating system that will help towards keeping energy costs down.

The revolutionary new system features the highest heat output of any retrofit UFH system, easily reaching 120W/m², and offers fast response times equivalent to that of a radiator, all with a low height build-up of just 22mm.

LoPro®Max can be installed in a wide range of projects on both ground and upper floor levels over solid and timber sub-floors.  The system uses a vacuum-formed castellated panel to securely hold the floor heating tube in place before covering in a specialist self-levelling compound, LoPro®QuickSet.  The compound is highly conductive and provides a robust and perfectly level floor surface which can be walked on after just eight hours and is ready for tiling within 72 hours – good news if your project is on a tight schedule.  LoPro®Max is suitable for all floor finishes including tiles, limestone, marble, engineered timber and modern vinyls as well as carpet.

The system integrates seamlessly with any radiator circuit and is the perfect partner for modern gas, oil and LPG condensing boilers as well as heat pumps.

The low running costs of LoPro®Max are a major plus point for any homeowner when compared to an equivalent electric underfloor heating system.  For example, a 30m² electric underfloor system would cost approximately £720 per annum to run.  LoPro®Max  costs just £240 when working with a gas boiler – a huge saving of £480, or 30p per hour!

Nu-Heat creates a bespoke system design for every project as well as supplying everything you need to successfully install a LoPro®Max whole house system, including detailed design drawings, clear and concise manuals and LoPro®Quickset.  Support from the experienced Nu-Heat technical team over the phone is also available if needed.

Key features of LoPro®Max:

  • High heat output – up to 120W/m²
  • Super-fast response time – equivalent to that of a traditional radiator system
  • The easy-to-use self-levelling compound can be walked on after eight hours and provides a perfectly level surface ready for tiling within 72 hours
  • One third of the running cost of an electric UFH system
  • Virtually any floor covering can be applied over LoPro®Max
  • All this with a low height build up of just 22mm

LoPro®Max is also available in OneZone packs, a perfect solution for installing UFH in single areas such as extensions or bathrooms.  OneZones are available in sizes 5m²-60m² and can be ordered online here.

Find out more about LoPro®Max and the entire LoPro® range here or call or call 0800 7311976.

UFH in extensions – the low down

UFH extension

The benefits of warm water underfloor heating in the home are well established: improved comfort, no intrusion on wall or floor space and low running costs. But did you know that the advantages of underfloor heating can also be experienced in conservatories, extensions and single rooms by adding it to the existing heating circuit?

Where the structure is built (or upgraded) to meet current building regulations there will be sufficient insulation present to allow the UFH to work at low flow temperatures, so efficiency can be maximised and energy bills reduced.

There are two scenarios to consider:

Option 1 – a new-build with almost any floor structure

This is a really straightforward proposition; area packs, such as Nu-Heat’s OneZone®, are available for both screed and floating floors in various sizes up to 60m2. In areas larger than this or in two-storey extensions the system should be fully designed by an experienced supplier to ensure optimum performance.

Option 2 – an older extension with insulation but limited scope to increase floor height

In the past fitting UFH in older properties has been challenging, which is why Nu-Heat has developed the LoPro™ range.  Both LoPro™Max and LoPro™10 are low height profile systems which are laid easily over any existing floor.

LoPro™Max is perfect for renovation projects, offering the highest heat output of any retrofit UFH system.  The system uses a castellated panel to hold the pipe in place and this is then covered by a specialist self-levelling compound.  Due to its impressive heat performance, the OneZone pack is perfect for extensions with large amounts of glazing and also conservatories.

Another option, LoPro™10, is a composite gypsum construction with one-third less thermal mass than a screed floor, allowing it to heat up and cool down rapidly – making it more economical for retrofit properties and giving quick response times. Its low thermal resistance and high mass (15,5kg/m2) provide a high thermal output and solid feel underfoot.

System controls

A well-designed floor heating system maintains a comfortable floor temperature through accurately controlling the water temperature entering the floor. Water is taken from the existing heating system, passed through the control unit and then pumped directly to the underfloor heating tube. The floor temperature needs to be raised only a few degrees above the room temperature to maintain an effective comfort level.

There are generally two options for controlling the times at which warmth is available in the extension area:


Plumb into the existing radiator system and use the existing heating timer as the master control. The programmable thermostat supplied with the UFH will be able to call for heat in the room during the times set on the main timer, but not at other times. The room heating will switch off when the correct temperature is reached within these times. This is most effective when floor constructions with fast heat-up times are used.


Bypassing existing system controls to give independent control over the underfloor heating system. Ideally, independent control should always be the preferred option. However this is dependent on the location of the room in relation to the existing system.

Wireless programmable thermostats provide a major benefit when retrofitting UFH systems as they remove the need for potentially disruptive hard wiring.


UFH in screed can provide heating of up to 100 Watts per square metre of floor area. This is normally more than sufficient to provide room temperature without supplementary heating, however it is important to ensure that the heat output from the floor will meet the heat loss of the structure in extreme weather conditions, especially in highly glazed areas such as conservatories; the supplier should be able to confirm this. By appropriate programming of the controls, rooms with screed floors can be heated to match the radiator system.

Floating floors, LoPro™10 and LoPro™Max also offer good heat outputs and they warm up and cool down quickly, meaning the UFH can be operated with timings similar to those of a radiator system.

Floor coverings

There are very few restrictions on the type of floor covering that is suitable for use with UFH as long as some simple guidelines are followed. The choice of floor covering will impact on the eventual height build-up, and must be taken into account in projects with limited height availability.

Ceramic tile, stone and marble all conduct heat extremely well and can be laid as normal with a de-coupling layer and flexible adhesive. Engineered timber boards can either be floated or fixed in place depending on the sub-floor structure. Carpet with underlay can also be used as long as the tog value doesn’t exceed 2.5.

Benefits of UFH in an extension

  • High levels of customer satisfaction
  • Energy efficiency
  • No impact on wall space or interior design
  • Versatile – can be used on ground and first-floors
  • Low-height options available
  • Integration with existing radiator system & controls
  • Easy to install

Retrofitting UFH – what every installer needs to know

Over recent years the cost of heating has gone up dramatically meaning UK residents are increasingly carrying out insulation upgrades to reduce bills. Often linked to this type of major refurbishment is the need to upgrade the heat source – and this is where you come in, as it offers the perfect opportunity for you to promote underfloor heating (UFH) to the existing property market in place of radiators.


What makes a system fit for purpose?

The most important aspects of any heating product from an installer’s point of view are likely to be ease-of-use, robustness, reliability and heat output capability – in a retrofit situation the overall height build-up may also be important. A UFH floor construction that delivers on these critical aspects is what all installers are looking for.

The choice of heat source depends on the fuel supply – if gas is available a modern condensing boiler will work very efficiently with UFH as the low flow temperatures allow it to run in condensing mode for more of its operating time, making it the most economical choice. Alternatively, oil, lpg or any source that can deliver controlled heat at the required temperature can also be used. There can be situations where a heat pump will be a viable option, usually where the property is undergoing major renovation to bring insulation into line with current building regulations, especially where direct-electric heating is being replaced. The flow temperatures required must be low enough to allow it to operate efficiently and deliver a sensible CoP, so it is always worth checking with the system supplier.

Good system design is crucial to the success of any heating system, particularly UFH in a retrofit project. Before you start…


  • Get heat loss calculations done, as this will determine whether the system shall perform as required.
  • Upgrade insulation; typically this would include double-glazing, loft insulation and cavity or solid-wall insulation.
  • Investigate the Government’s Green Deal funding initiative as some of the upfront costs of insulation upgrades and UFH could be offset against future energy savings.

 Step-by-step – the easiest way to install Nu-Heat’s LoPro10® retrofit UFH


  1. Clear the floor area, repair and level the floor as required using self-leveling compound or replace/screw down uneven suspended timber floors.
  2. Lay pre-routed panel and castellated panel for pipe run back to manifold following the system design drawing supplied.
  3. Lay ‘pipe run’ panel where shown on the design drawing. This panel gives plenty of flexibility to install multiple pipes back to the manifold.
  4. Run 10mm pipe from the manifold to each designed zone.
  5. Fill and pressure test the system. This is a crucial part of any UFH installation as it ensures the system is watertight before final floor finishes are laid.
  6. Lay self-leveling compound to cover edge ‘pipe run’ panel and leave to dry for 24hrs.




  • Carry out all 1st fix mechanical pipework and electrical wiring, building and plastering work before installing retrofit UFH, which should be fitted at 2nd fix stage to avoid damage to pipes or panels – this floor construction can almost be considered in the same way as a floor finish.
  • Ensure the panel has a firm base on which to sit to remove any possibility of movement.
  • Pay particular attention to which end of the room will have turns panels; the other end will have straight panels butted up to the ‘pipe run’ panel.
  • Check which coil lengths go in each zone as they may vary in length and only trim each one to the length shown on the system design when all the coils have been installed.
  • Use the edge batten and the 15mm height of the panel to achieve an even, level finish for the self-leveling compound.


Final floor finishes

Tiles, engineered timber, carpet and vinyl are all suitable for use with retrofit so long as the supplier’s guidance on best practice is followed.

  • Tiles – a de-coupling membrane and flexible adhesive should be used to guarantee performance.
  • Engineered timber is recommended instead of solid hardwood flooring, as its structure is inherently stable. Glue, butt joint and free float the floor over the panel. A 5mm acoustic layer can be fitted under the panel on suspended timber floors if required.
  • Carpet plus an underlay suitable for UFH with a combined maximum tog value of 2.5 is recommended.



Customer satisfaction

Due to its good response times, a retrofit system such as LoPro®10 can be set up, controlled and run in the same way as a standard radiator system with similar system times and control settings. This means that homeowners do not have to radically change the way they use or program their heating system.

Warm houses, happy customers and a new market to make the most of in these trying economic times – retrofit UFH has got to be worth investigating.