Does Wet UFH need a floor temp sensor

[Pheo]

Investigating UFH heating kits for our extension. I was planning on using a Nest (as we already have one) to control it.

However I've realised I'm not sure you can configure the Nest with a floor temperature sensor.

Is one of these needed? Is there a way of plugging one into a nest? Or should I consider a different controller type.

[037]

Wet UFH system will work great with a nest room stat.
I may be wrong but you don’t put a floor temperature probe in like you would with an electric system.

[SS9]

It's all about the temp of the room, not the temp of the floor. A nest will work fine (as someone who has this setup).

[Pheo]

Great thanks guys

[caziques]

A floor thermostat isn't really necessary. Just be aware with underfloor heating the room temperature can keep rising after the heating is turned off (as energy keeps coming out).

[Alucidnation]

Floor temp is very different to room temp and the probe will keep a tighter control on it all.

Thats why most UFH stats come with one.

[anonymous-user]

Alucidnation said:

Floor temp is very different to room temp and the probe will keep a tighter control on it all.

Thats why most UFH stats come with one.

Although they are available as an option on UFH, you do not need a floor sensor.

I’ve now had four houses with Wet UFH and none have ever had a floor sensor.

Set the manifold to the required heat depending on floor makeup, mines on 45 for concrete, and let the thermostats do their thing.

[Alucidnation]

garyhun said:

Alucidnation said:

Floor temp is very different to room temp and the probe will keep a tighter control on it all.

Thats why most UFH stats come with one.

Although they are available as an option on UFH, you do not need a floor sensor.

I’ve now had four houses with Wet UFH and none have ever had a floor sensor.

Set the manifold to the required heat depending on floor makeup, mines on 45 for concrete, and let the thermostats do their thing.

What you also have to remember is the probe is there to provide a limit on the floor temperature.

Just because you control it via the manifold, that doesn't mean any future owners of the property will.

[anonymous-user]

Alucidnation said:

garyhun said:

Alucidnation said:

Floor temp is very different to room temp and the probe will keep a tighter control on it all.

Thats why most UFH stats come with one.

Although they are available as an option on UFH, you do not need a floor sensor.

I’ve now had four houses with Wet UFH and none have ever had a floor sensor.

Set the manifold to the required heat depending on floor makeup, mines on 45 for concrete, and let the thermostats do their thing.

What you also have to remember is the probe is there to provide a limit on the floor temperature.

Just because you control it via the manifold, that doesn't mean any future owners of the property will.

Fully understand that - I was merely clarifying that you don’t need a floor sensor.

As I said, I’ve had four systems without a floor sensor and know of many others without. Maybe your experience differs to mine.

[Pheo]

Thanks! Now I just need to decide which UFH brand to buy.

Anyone used Prowarm? Seems £200 cheaper than everything else.

[Alucidnation]

Never heard of them

We only ever fit Heatmat.

And if you are going electric, fit the probe and use a proper thermostat and keep the Nest for the main system.

[Pheo]

This is wet UFH.

Other options Polypipe and JG.

DIY fitting so looking for it to be simple and easy.

[Alucidnation]

Fair do's.

I would still install the probe though.

Good luck.


PS Don't use Warmup.

It's shyte.

[Classy6]

Main reason for floor temp sensors is due to certain types of flooring, I think it's mainly engineered wood? Temp can't be above X* as it can damage the floor if it gets too hot.

[Pheo]

anonymous said:

[redacted]

One UFH zone, Plus radiators. Currently on a combi.

Plan to install S-Plan with two motorised valves and link the Nests that way (as per the Nest install guidelines.

Need to check Heatmiser and the like though to see if they're a better idea.

Edited by Pheo on Sunday 11th November 18:30

[jason61c]

I've just done 3 zones of UFH(diy).

I got it from here in the end https://www.vpsunderfloorheating.co.uk/

Its a hetta manifold and pipe, really good quality compared to most. Heatmiser controls. I had loads of extra heating bits off them(zone valves etc) as they were so good to deal with and very well priced.

[Muncher]

As mentioned the floor sensor is to prevent the floor getting too hot, which can damage certain floor types, engineered wood in particular.

[maccas99]

The floor temperature sensor or probe in Wet systems is mainly used for bathrooms.

[OMITN]

This thread has got me thinking....

I've just (this weekend) had the rest of the Amtico laid in our house, with this final section being over the wet UFH.

I have a Nest thermostat for the dining room/kitchen, which controls the UFH and a separate Nest for the radiators in the rest of the house.

The Nests work fine, but the limit on temperature for the Amtico - 27 deg - means that, because I don't have a probe, the air temperature at the nest is going to be somewhat different from the floor temperature.

Other than common sense (I have a wife and a daughter to challenge that concept), anything else that would help? Infrared heat sensor?

[Toltec]

OMITN said:

This thread has got me thinking....

I've just (this weekend) had the rest of the Amtico laid in our house, with this final section being over the wet UFH.

I have a Nest thermostat for the dining room/kitchen, which controls the UFH and a separate Nest for the radiators in the rest of the house.

The Nests work fine, but the limit on temperature for the Amtico - 27 deg - means that, because I don't have a probe, the air temperature at the nest is going to be somewhat different from the floor temperature.

Other than common sense (I have a wife and a daughter to challenge that concept), anything else that would help? Infrared heat sensor?

That temp does seem to be what is quoted, seems really odd though, I take it you cannot walk on it in bare feet and have to shield it from direct sunlight even if you not have UFH?