I recently purchased a 30 year old home. it is 2600 sq ft upstairs and 2600 sq ft in a daylight basement. I am in the process of updating it and adding a home theatre in the daylight basement. The theatre room will be enclosed with seating for probably eight to ten people. As a result it is going to need some guts to cool all those bodies. The mechanical room is roughly in the center of the house. The mechanical room is unifished so the ducts are exposed. The new HT is adjacent to the mechnical room. So, I got some proposals on how to achieve this from two local HVAC companies.
The existing system is a 120,000 BTU furnace that I guess is only 60% efficient and a 4 ton AC unit. The thermostat is located upstairs.
The first proposal was for a carrier infinity system. They proposed a new infinity ICS 100,000 BTU furnace and then an infinity 16 5 ton heat pump. Then to seperate the house into three zones; north of the furnace, south of the furnace and lastly, the HT.
The second proposal was for a Coleman Echelon 100,000 BTU furnace and a Echelon 5T 5 ton heat pump. Then Arzel zoning with upstairs, downstairs and the HT. On the proposal it said it would have a variable speed blower and the HP would be dual compressor stages at 3 and 5 tons.
I like the idea a lot better of seperate up and downstairs zones versus north and south. But then again, it is more money.
Any input from the experts out there? I don't know a whole lot about HVAC systems and they aren't things you can go and test drive.