Temperature for underfloor heating

golfergirl28

We've just had electric underfloor heating installed in an ensuite shower room. It was set at 21 degrees but this was barely noticeable. The floor is tiled and I think there is plywood below the tiles and above the electric mat. How much higher can I put it up? Can't find anything in the instructions.
This certainly wouldn't be sufficient in the winter.
Hope we haven't made a mistake having it installed!

scottishminnie

Hi


I had warmup installed in an en suite refit last year. I'm having a similar problem where the heating has to be set to at least 82 (I'm old fashioned Fahrenheit) before it is noticeable. Friends talk of leaving towels on the floor when they shower and lifting warm towels however I have never experienced this.


I've had the engineers back twice and they insist the temperatures are perfectly normal however I'm not convinced so I'll be interested in the responses here.


Sorry I haven't anything helpful to add - only a similar tale!

melb

the plywood should be below the electric mat I think. Did you install it yourselves? What make is it? We have ours on at 17degrees I think even in winter. Hope some experts will be along soon to help you.

System

how long have you let it warm up for?
it should heat the tiles up to the same temperature in the winter so you'll notice it more then, and ufh is designed to provide a comfortable temperature for a long time rather than a high temperature for a short time like traditional radiators...

But agree with the above, if you've got it under plywood you are going to waste a lot of money heating up that before feeling any benefit in the room

golfergirl28

It's Devi. It was professionally installed during refit. Maybe I've got it wrong about the plywood.....mat could be on top of it.
Scottishminnie, we have identical problem.
Will contact installer but wanted some input from you all. What's a safe max temp?
21 degrees was noticeable.

golfergirl28

Meant to say 21 degrees was NOT noticeable.

daveyjp

What is the current room temperature? If it is above 21 degrees the system may not be operating.

golfergirl28

The system appears to be working because the floor tiles are less cold than the wall tiles. They're not warm........ Just less cold......... if you see what I mean.

southcoastrgi

the thermostat is normally located under the tiles so 21 isn't your room temp it's the floor temp

JohnB47

We have ufh in our bathroom. Normal wooden floorboards, then some sort of insulation board, then the ufh mat, then large floor tiles. We have to set it to 27 degrees to get gentle warmth.

We also have a towel rail in there - dual central heating and electric. The coldest it gets in autumn/winter without the ufh or central heating on is 19 degrees. With central heating on and without ufh, it shows 21 degrees. (These are floor temperatures)

So your experience matches ours - setting ours to 21 degrees probably wouldn't even be noticeable. I was initially surprised by this too but I guess its down to needing a surface you touch to be much warmer than you would need as an air temperature. Eg if you walk into a room with an air temperature of 21 degrees you'd find it comfortable but a floor tile, set on a table in that room for some hours, would be cool to the touch.

southcoastrgi

with electric the temp sensing probe is under the tiles, wet is done via a stat on the wall just like rads which senses air temp