Nu Heat: Low Pro Max - Wet Underfloor Heating?

[Andehh]

Does anyone have any experience with this? We are looking at approx 35-40sqm of it for a kitchen/dining room install we will be doing.

Due to the concrete floor already in there, we are limited by height somewhat but this claims to be as good as the usually 70mm worth of insulation others require.

It costs about twice as much, but I don't mind this if the performance lives up to expectations.

Cheers

edit: Link to it:
http://www.nu-heat.co.uk/products/onezone-ufh/lopr...

Edited by Andehh on Thursday 22 January 16:26

[guindilias]

Can't see the vid, is that where it claims it's as good as 70mm of insulation? Must be bloody magic then, otherwise nobody would use 70mm of insulation, because it's a right hassle!

[Andehh]

hmm, cant see it listed anywhere now. There is a good chance I am assuming that as 60-70mm off insulation is what comes with rival's standard UFH Nu Heat have something more quality v quantity in their lo pro max? - they certainly charge like they do!

[untruth]

I think all these providers are the same. They don't have actual floor insulation in them to building regs. They all claim very low elevation, and they are right - it is minimal if you have insulated floor and want to put UFH in without too much fuss.

However if you had building control in on a retrofit on non insulated floor they would ask you where your insulation is going...

[untruth]

I have looked at the same thing incidentally, and as far as I have gathered, no low profile UFH solution will get round the building control requirement to insulate a floor unless you have a BCO who will be very nice and agree that digging up the floor is not worth the investment vs. the cost saving of insulation over X years.

Though I would probably think at that point they might just say "radiators?" to you.

[guindilias]

Aye, I don't know what they think is special about their product apart from having a thinner screed, and that's only because it's SLC rather than a true screed! Not sure about their claims for "Thermal conductivity" of the screed meaning they can get up to 120w/m2 - I have a building running at 150w/m2 (another listed building, draughty etc) with a 75mm ultraflo screed and it's absolutely grand.
I'd also imagine their values are for a bare fitting, i.e. taken with just the SLC in place, no floor covering which would reduce what you would pull from it.
Best given a miss, IMO. Overpriced for what seems like no real advantage.

[Fuzzy400]

It would be interesting to see how efficient it is as well, because with just 20mm of screed I imagine the floor would lose its heat quite quickly thus having to put more heat into the floor more regularly than a standard system.

[Fuzzy400]

It would be interesting to see how efficient it is as well, because with just 20mm of screed I imagine the floor would lose its heat quite quickly thus having to put more heat into the floor more regularly than a standard system.

[guindilias]

I'd be worried about the floor covering as well - if the whole system is only 22m thick, and PEX underfloor pipe is typically 16mm, that leaves the pipes just under the surface of the screed by a few mm - it's not exactly going to be a nice even heat distribution. More like warm lines and cold bits in between!

[Pheo]

I suspect this is a bit like when you fit retrofit underfloor electric heating. I installed 1cm of XPS insulation directly onto the screed (using tile adhesive), and then tiled over that.

Its secondary heating, so wouldn't overly concern me regarding heating losses and w/m2. Works fine for our purpose.

Perhaps they assume that you probably have a screeded floor with some insulation in.

Also, did anyone else notice in the demo video they fitted the floor up to the kitchen appliances? Good luck getting the fridge out!

[Carlozcat]

I have revived this post as I am wanting to know if anybody has experience of using the Nu -Heats LoPro Max system. We have having an extension built and I am looking for underfloor heating. We need a system with a low profile although we will have the following build up:
Concrete
75mm insulation
Chipboard
Underfloor heating
Vinyl

Would like to know how effective the system is as the website states that it has a super fast response time with heat outputs up to 120W/m2?

[Trustmeimadoctor]

Funny I was looking at this yesterday. How do I find out how my floors constructed?

[Ollerton57]

I'm in the middle of an extension and am having wet underfloor heating installed throughout the ground floor. The plumber is using a system from a Dutch company called JT. Website (no affiliation) http://www.jk-gb.com

The advantage seems to be that they cut into existing floor and collect the dust. This then forms a screed, but as it's such a thin layer on the top, it's ready for tiling after a day or two. They have only done a couple of installations in the UK so far but they seem very impressed with the speed and cost. We've been quoted £4k to do the living room, downstairs loo, hall, utility, study and kitchen.

[pterodroma]

Trustmeimadoctor said:

Funny I was looking at this yesterday. How do I find out how my floors constructed?

Get yourself a pry bar, multi tool, sledgehammer etc and have a look...

[Muncher]

Ollerton57 said:

I'm in the middle of an extension and am having wet underfloor heating installed throughout the ground floor. The plumber is using a system from a Dutch company called JT. Website (no affiliation) http://www.jk-gb.com

The advantage seems to be that they cut into existing floor and collect the dust. This then forms a screed, but as it's such a thin layer on the top, it's ready for tiling after a day or two. They have only done a couple of installations in the UK so far but they seem very impressed with the speed and cost. We've been quoted £4k to do the living room, downstairs loo, hall, utility, study and kitchen.

Very clever!

[Andehh]

Carlozcat said:

I have revived this post as I am wanting to know if anybody has experience of using the Nu -Heats LoPro Max system. We have having an extension built and I am looking for underfloor heating. We need a system with a low profile although we will have the following build up:
Concrete
75mm insulation
Chipboard
Underfloor heating
Vinyl

Would like to know how effective the system is as the website states that it has a super fast response time with heat outputs up to 120W/m2?

Remove the chipboard, and install the NuHeat system straight onto the insulation & you are onto a winner there!


We only didn't go for it in the end, due to us having insulation then a ??mm concrete slab on top as a the floor make up. I didn't want long-ish warm up times in the kitchen/snug we ere going to lay it (1/4 of the house) thn have the rest of the house (radiators) warming up much faster

Only logic behind that is they have 30mm odd screed, with the heat dissipating everywhere - including into our ??mm subfloor- before it warms up the room.

if you can lay it straight onto the insulation you have an ideal situation, and one whose warm up time will be about as good as it gets!

[Rosscow]

Muncher said:

Very clever!

Well, it’s a good idea.

But I wouldn’t want to install into a floor with minimal if any insulation.....

[nyt]

I have a nu-heat system.

It takes hours to warm up and the pump is quite noisy.
It seems to require frequent adjustment of the flow rates through each of my three circuits.
Support has been a problem.

I have no way of knowing if the problem is nu-heat or a poor installation. I do know that local plumbers are very reluctant to do anything with it.

I wouldn't use it again.

[Trustmeimadoctor]

pterodroma said:

Trustmeimadoctor said:

Funny I was looking at this yesterday. How do I find out how my floors constructed?

Get yourself a pry bar, multi tool, sledgehammer etc and have a look...

Seems rather full on! Just to see what's under the concrete. Can't I ask the builder or something?

[Andehh]

nyt said:

I have a nu-heat system.

It takes hours to warm up and the pump is quite noisy.
It seems to require frequent adjustment of the flow rates through each of my three circuits.
Support has been a problem.

I have no way of knowing if the problem is nu-heat or a poor installation. I do know that local plumbers are very reluctant to do anything with it.

I wouldn't use it again.

Pumps are noisy by nature, considered where it is mounted? I moved ours onto a different wall due to the noise I could hear. Though I am very sensitive to mechanical noise.

As for ages to heat up. You could stick it on a cold concrete floor a mile thick & it will take all day to warm it up. Lay it straight onto insulation and you will feel the warmth in 30mins. What is the make up of your floor? I imagine you laid the system straight onto a concrete subfloor?

Trustmeimadoctor said:

pterodroma said:

Trustmeimadoctor said:

Funny I was looking at this yesterday. How do I find out how my floors constructed?

Get yourself a pry bar, multi tool, sledgehammer etc and have a look...

Seems rather full on! Just to see what's under the concrete. Can't I ask the builder or something?

Every house is different, unless modern. If you post a thread on pistonheads with images & details of the age of your house people might be able to help give you an idea! A lot depends on the age.