Should UFH be nearly scalding at floor with Vinyl (LVT)?

[Mr S]

Hi All.

I'm pretty sure the answer to the above is "no".

I've recently had UFH installed, with a mixture of porcelain (kitchen) and LVT (lounge). I have a mixture of neoStat wall stats but no floor probes. (I was never advised to get such). The UFH in lounge is sitting in Polypipe Boards and in scree in kitchen.

Now that we actually (post-heatwave) need the UFH, we've noticed that the LVT is "spongy" and almost too hot to stand on.

I assume this means the temperature is way too high? That, or there isn't enough substrate between pipes and LVT.

What's the best way to address this while ensuring performance (i.e. that it's still hot enough to warm the tiled areas). Should I ask the installer to reduce the temperature? Should I insist on lifting things up and fitting floor probes (which sounds painful)?

Many thanks in advance.

 

[ShaunCorbs]

There should be a temp gauge on the manifold what's this set at also any pics of the manifold

 

[Mr S]

There should be a temp gauge on the manifold what's this set at also any pics of the manifold

Many thanks for replying. Do these help?

 

[ShaunCorbs]

Yes that's running way to hot 65 dc through the under floor way way too hot can cause problems for your floor

Get the people back who installed it

@Uheat – Jake

 

[Mr S]

Yes that's running way to hot 65 dc through the under floor way way too hot can cause problems for your floor

Get the people back who installed it

@Uheat – Jake

Thank you. One quick thing. Isn't 65 dc the input temperature (from the boiler) and 53 the temp going into the floor? Am I mis-reading things? (Of course, 53 dc may well still be too hot). Thanks again!

 

[Chalked]

Turn the thermostat ( black knob that’s upside down) slowly, while the heating is on, until you get a constant 40 degrees. On the top dial. Then adjust each flow restrictor, until the return temp gauge reads around 7 degrees lower.
Takes a bit of time to do, but will work correctly.

 

[Chalked]

A
So looks like the actuators are on manual. They should face the other way. Turn clockwise to put onto auto.

 

[ShaunCorbs]

A
So looks like the actuators are on manual. They should face the other way. Turn clockwise to put onto auto.

Also doesn't look balanced

 

[Mr S]

A
So looks like the actuators are on manual. They should face the other way. Turn clockwise to put onto auto.

Hi. Just so I'm clear, because the heating is responding to the neoStats. What do the actuators do? Are they not being controlled by the wiring attached to the neoStats? Thanks

 

[Mr S]

Also doesn't look balanced

Apologies for not knowing the terms. "Balanced" how?

Thank you for your continued help.