|Originally Posted by sonicboom|
ebr, after you meet with the HVAC contractor, let me know what you've learned.
I had an HVAC guy in today, and that's when I realized that I didn't know if I really needed cooling during the winter months. From talking with you folks today, it seems I will, so now I need to learn what my options are. The most obvious is a separate system, but I'm hoping for something less extreme/expensive.
The other rooms in the basement will be: a kids playroom, a small lobby for the HT, and a hallway. I'm willing to sacrifice the temp in the other basement spaces to satisfy the HT when in use.
sonicboom, I'm located north of the border (Ottawa) and recently finished a
basement general purpose home theater room. It's 13'(w)x32'(l)x7'5"(h) and
also fretted for weeks while I was in the stage of adding HVAC for the room.
Instead of adding a zone, I gambled and chose to extend the existing single
zone into the basement.
I added strategically located sources and returns (2 of each) and
also added a dedicated exhaust for the room. (powered by a quiet Panasonic
bathroom fan). The thermostat is located upstairs in the main living area and
our furnace fan runs continuosly (new mid eff lennox), so air is always moving
throughout the house, including the basement. Generally the HT/basement
runs about 1-2 degrees lower than the main living space (with the thermostat).
After loading up the room with people, electronics and watching a movie for a
few hours, the temp in the basement usually rises to about 1 or 2 degree's
higher than the main living space. Fortunately, the basement is quite comfortable
so I haven't had to run the dedicated exhaust fan in the basement at all. It's been
cold the last few days (-10 to -15 C) and I'm pleasantly surprised (relieved) that
in my case the gamble seems to be paying off. I'm hoping for the same behaviour
in the summer months with the AC. This last summer, the basement followed the
same 1-2 degree deviation trend from the main living space with AC.
In the end, I found the HVAC was the most stressful part of a 7 month project
since you don't really know what your dealing with until after the drywall and
carpet are down on the floor.