I am looking at purchasing a new house. To my dismay it is not a zoned system, which is the only issue I have with it. It was something I was really hoping for since our current home has different temperatures on the main / upper and basement floors.
The house we are looking at is about 3000sq ft. All the basement floors have radiant hot-water heat.
When we arrived at the home, it was quite cold in the basement (not surprising considering the A/C was on - have the same problem at my current home). My question is two-fold:
1. Even with a zoned system, when the A/C is on at the upper floors, will the cold air "drop" to the basement causing the basement to be very cold? (So, what I am getting at is even if we do have a zoned system, during the summer when the A/C is used, will the basement be freezing regardless?)
2. Will turning on the basement in-floor heating when the A/C is on result in huge energy waste? I would just like it to be comfortable down there as we plan on using it as a movie room...
3. In the winter during heating season, is it more economical to turn the radiant floor heat up a few degrees higher than the furnace setting so that some of the basement heat will creep upstairs? (e.g., is radiant floor heating more efficient than a 95%+ natural gas furnace)?