I live in A cold part of UT. This is the first house with a basement that I have owned and also the first time that I have lived in a cold climate.
I will ask my question first with the backround info below.
I have three levels with one zone/thermostat. Is there a way to add remote programmable temperature sensors that ONLY turn on the recirculation fan for the HVAC to even up the temperature of the house when the temperatures vary from the main t-stat by X number of degrees?
Are the thermostates with the "recirculation" feature where they turn on the FAN for so many minutes 4 or so times a hour effective enough to use that instead of investing the extra money with remote sensors?
The basement is partialy finished (to be fully finished at a later date), this is also where the gas furnace and central AC is located.
The house has a total of 3300 SQ FT with aproximately 2500 finished. There are three floors including the basement.
There is only one HVAC unit unfortunately.
My issue is that it is difficult to attain an even temperature throughout the house. I have modified the cold air return system to make the basement bearable in the winter. It was totally unusable before. To do this I isolated the utility room in the basement where the HVAC unit is from the rest of the unfinished portion of the basement(drywalled the triangle shaped wall below the stairs). I also added a cold air return with a filter from the finished portion (basement living room) since I found that the suction of the fan has a 3"x 20" opening (that pulls air from the utility room) along with the regular cold air ducting that pulls from the base of the stairs on the main level and another one on the stairs to the basement. I also (after testing the effects) blocked about 60% of the cold air return that is located on the basement stairs (near the top). It now seems to draw more warm air into the basement living room and it is MUCH more comfortable, yet still 3 or 4 degrees cooler than the main level.
If we plan on using the basement in the winter OR if I am working nights we turn the Fan from "AUTO" to "ON" to even out the temperature for the basement to be comfortable (warmer) or the Master Bedroom (top floor) to cool down if I am sleeping durring the day (southern exposure).
Thank you for your time.