I contemplated moving my thermostat from the middle room of our house (the dining room) to the room furthest on the north side since the north side was always the 'coldest' room in the house. Well, I was talked out of it because: ...
The dining room happened to be a 'compromise' as far as location. The thermostat is on the north wall (facing south) in the dining room, still, because moving it to either the south or north room would cause different parts of the house to be colder or warmer, relatively speaking. In other words, by me leaving it where it is now, where it's set to 66 degreese, the south room gets to 69 and the north room gets to 64.
Since, in summer, we don't care if the north room is the coldest in the house, my Brother-in-law (who is an HVAC pro) suggested we either put in a natural gas fireplace or add a 3rd heating duct to the north room. The duct would be a 4" duct; not a 12" duct. You don't want to 'steal' too much air from the rest of the system, ya know. We're contemplating the latter once he gets some time to visit us.
I'm sure others will have more to offer so stick around a few days to see what they say. My best to ya and hope this helps.
Jay J -Moderator
PS: God Bless America!