thermostat recommendation please

angeldaisy

I'm in the process of updating my heating system. I have a geothermal heat pump working with underfloor heating. Each of my rooms has a dial thermostat which obviously control the temperature in the room.

What I need to do is replace the dial stats with programmable ones. Ideally what I want to be able to do is set them each room individually to come on at various times during the day/week.
Sorry if this sound obvious, I'm a bit clueless!!

Any recommendations?

Wearb

I think the reaction time of UFH is too slow to have that kind of tight control.

There will hopefully more replies from people with more experience with it.

freddyuk

Decent programmable controllers have UFH settings which allow response times to be effective with UFH. You don't want UFH to be on or off at set times you want it to "float" between minimum and maximum temperature. It is easy to get a temperature overshoot where you set a room stat to your desired temperature as the heat can continue increasing after the heating has turned off so you need to allow for this. Allowing the system to completely cool down means long and expensive reheat times. If your house is not draughty or badly insulated UFH is great. If it is draughty your bills will be higher.
Also if you installation is not ideal it may not hold temperature well ie. insufficient insulation or floor mass to hold/release the heat.