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.

Technical Tips – Underfloor heating solutions & install options

Warm water underfloor heating (UFH) in a suspended timber floor offers all the benefits associated with this form of heating without adding height to the overall floor construction, making it a popular solution. We talk to Heather Oliver, Development Manager at Nu-Heat, for some tips on where it can be used and how to install it effectively. 

There’s no doubt that underfloor heating is an established space heating method, delivering comfortable and cost-effective warmth. That said, a proportion of the thousands of domestic installations carried out each year are to the ground floor of properties only, since installing upstairs (particularly in retrofit situations) has been seen by some heating engineers and underfloor heating companies as more problematic. However, there are solutions for suspended timber floors that incorporate a metal heat transfer plate designed specifically to act as a thermal conductor, improving both response times and ease of installation.


A flexible solution for ground and first floors


UFH laid between joists

Flexibility is the key – a UFH floor construction that can be fitted over first-floor joists from above before the deck is laid or between the joists from below after the deck is laid is ideal in terms of installation, as it allows installers to work on site without affecting the build schedule of the other trades. Where the heat transfer plates have been fitted over the top of the joists, the heating tube can still be fitted from below if it is more convenient, which is a bonus in terms of health and safety as there will be no balancing on joists to install pipework. The plate is compatible with most types of joists: traditional timber, TJI/I-beam and steel braced systems (Eco-joists, Posi-joists, etc).

Retrofitting this floor construction into the first floor of an existing property can also be straightforward if the homeowner is happy for either the existing floorboards to be taken up or the ceiling below to be removed. If this is not the case there are other floor constructions that may be more suitable, so it is always best to check with your UFH supplier before making any recommendations. First-floor rooms typically require less heating than ground floor living areas, partly because they are likely to be over a heated space, meaning a UFH solution is often suitable for retrofit projects. 

UFH laid over joists

A solution that uses heat transfer plates can be used on suspended ground floors where there is sufficient insulation present – not a problem in a new-build, which will have been built to meet building regulations, but something that needs consideration in a retrofit scenario. If the insulation needs to be upgraded, mineral wool in a bag can easily be clipped to the sides of the joists, standard mineral wool can be laid on top of netting or solid insulation panels can be cut to fit and wedged/fixed in place between the joists.

Obviously, any heating system has to produce sufficient heat output to warm the building effectively, so a system that incorporates metal heat transfer plates has a built-in advantage, as they will heat up relatively quickly and on/off times can be programmed in a similar way to a radiator system.



Acoustic options for flats

For flats, apartments and communal buildings this construction is also available as part of an acoustic floor cassette that incorporates a gypsum panel as part of the floor deck and meets pre-completion testing criteria, so again it is well worth checking that your supplier can offer this. The alternative option is one that installs the plate over an acoustic batten fitted to the top of the floor deck; this is fine for situations where the level of the deck can be raised.

Installation tips

  1. If solid joists are present either follow the building regulation rules on notching to allow the UFH tube to pass between joist bays or alternatively, fit a 15mm batten to the bottom of the joist leaving a gap for the tube to pass through.
  2. It is quickest to work in pairs – one person lays the plate and the other follows behind with a drill fixing it to the joists with screws.
  3. Once the plates are securely in place (either on top of or between the joists) the floor-heating tube can be fitted – one person holds the tube and another clips it into place. Because the plate is metal and slightly pliable the tube can be easily pushed into position, so it should be possible to fit a 20m2 room in just 30 minutes. 
  4. Organise the installation like an assembly line so that while one person push-fits the tube in place, the other can prepare the next room – this will allow you to maintain momentum throughout the job.

And finally…

Most importantly, a plated UFH system is likely to be cheaper to purchase than other joisted floor solutions and is quick to install, meaning your customers will get an effective heating system that is affordable to buy, install and run.

Nu-Heat offers a range of energy-efficient pump options that meet the requirements of the Energy Using Products Directive (EuP)

Grundfos EE pump



Nu-Heat offers a range of energy-efficient pump options that meet the requirements of the Energy Using Products Directive (EuP).




Agreed in 2005, the objective of the EuP is to reduce carbon emissions by reducing the amount of energy used, including in domestic heating and hot water.

Nu-Heat now supplies the Grundfos UPS2, one of the most advanced energy efficient domestic circulators of its kind on the market today; essentially, a direct replacement for previous models. The reduction in power consumption has been achieved by using the latest permanent magnet motor technology.

All underfloor heating system pumps, EnergyMaster thermal store shunt pumps, and heat pump charge pumps supplied by Nu-Heat meet the new standard. Applications that fall outside of the scope of the directive include solar thermal system pumps, and hot water loop pumps.

Using pressure controlled operation power consumption can be reduced to as low as 5 watts. The new models are simple to install as new or replacement pumps, and are 130mm between ports.

From January 2013 only energy-efficient pumps will be supplied as part of Nu-Heat systems.