We have just had our heating/cooling system zoned into 4 zones using a Honeywell Trol-A-Temp system. We are considering replacing the AC unit which is a 3.5 ton unit with a smaller one. I used the HVAC Calc Residnetial software(Great Program - Very Intuitive and Easy to Use) and came up with a total heat gain for the building as 33,789. The largest heat gain in any of the zones is 16,300. How do we size the AC unit? Since there is a foyer, there will be heat flow between the zone.
Thank you for the help.
[Edited by fmwaz on 05-17-2001 at 11:25 AM]