In Floor Heat Thermostats

[duwem]

I have read that some systems use a thermometer in the concrete?

What goes in the concrete to do this, wires, pex with sensor etc?

Thanks

 

[Jess]

When I installed the pipe in my floor before the concrete was placed, I ran a separate piece of pex from the manifold panel at the wall into the centre of the floor. Tape the end to keep concrete out of it. Once the system was installed, a floor thermostat was slid inside the pex. There are different lengths, so check which one so your pipe is around the same length or less.

 

[zmaxmotorsports]

I'm more worried about the affect it's having on the room temp myself.

 

[rburke65]

Are you heating the air or the concrete?

 

[BadgerBoilerMN]

Most of systems operate on a standard air thermostat with an option for WiFi--Ecobee. We used both in a recent 2 million dollar home.

 

[rburke65]

Well, that's 2 that you have answered for me Badger!

 

[tfinniii]

This is what I used for floor heat.
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire

SKU:A3030101

Brand: Uponor (Wirsbo)
Uponor (Wirsbo)

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$57.95 / each

 

[duwem]

Thanks for the link, but I don't see discussions about the sensor/ wires themselves other than how many wires? Or is it just sensing air temp? Not sure how that would be any different than any other thermostat in a non in floor heat application?

 

[BadgerBoilerMN]

This floor is electric, over the concrete and under ceramic tile, so a slight difference as the heat rises only through 3/8" or so of tile and grout, not many inches of concrete.
The thermostat measures air temp AND floor temp.
It can be set to maintain either of them, your choice.
This one is currently set to maintain floor temp.
There is generally a Huge difference in floor and air temp.
I guess eventually, if you never open a bay door, or exchange air in any way, things would balance.

There is normally, little difference between a radiant floor surface temperature and the ambient air temperature dependent on the heat load the house. Mine very from 2 to 12 degress Fahrenheit.

 

[BadgerBoilerMN]

The span is load dependent. I don't know what there is to trust. The technology is over a hundred years old.

The output of the floor will change according to the load, be it ambient, conductive or radiant. If you open a door the floor will output more heat at the same system temperature.