Two stage T-stat and radiant

Steve Garson_2

I have radiant heat in my master suite, which we keep at 65* at night. During the day, we use an electric baseboard to raise the temp to 70*, which has a separate thermostate. We do this, because the mass of the radiant floor leaves the room to warm to sleep. By doing this though, the room is 100% heated by electric, since once the temp rises above 65*, the circulator will obviously never cycle on. So the floor will get cold eventually.



It seems that there might be a better way to handle this?



Steve

Boston

Gordy

Why

If you like the master suite at 65 for night why are you boosting temp to 70 during the day?



Is this master suite it's own zone?



I guess I'm thinking set it to 65 with the rf and leave it skipping the supplemental base board.



Does this zone get solar gain?

Jean-David Beyer

It seems that there might be a better way to handle this?

If you have outdoor reset, set up the slab to maintain 65 24/7 and leave it like that. This will require pretty accurate setting of the reset curve.



Then install radiant panel or baseboard or something low mass on a zone that runs at a higher temperature, and set the circulator or zone valve on a thermostat set at 70F. This will enable a fairly quick increase in the temperature without overheating the slab. At night, the 70F thermostat can be switched off and the slab will maintain the 65F temperature and you will not have to wait for the slab to cool down at night or warm up in the daytime.

Steve Garson_2

Radiant Bedroom heat

No solar gain. Room is on North. We like to sleep at 65 and if we want to relax and use the room in the day, we like 70.



Steve