My wife and I recently purchased our first home in Boston and decided to upgrade the heating system. Unfortunately, we ran into the wrong installer. The home is 3 levels (1850sq ft), which includes an attic (that gets really hot). Per his suggestion we purchased a Goodman 115,000 BTU gas furnance, coiler, and a Goodman 4 ton condensor. The system was set up in the basement, and here is a description of of how he ran the duct work:
Trunk running from basement system to second floor where he has a branch to supply attic, master bed, and bath.
Return duct work on 1st, 2nd, and attic
The trunk on the 1st floor has, 6 take-offs (all on top of each other)supplying flex lines to the 1st floor rooms (800sqft)
on Second floor (700sqft) Branch of trunk with 7 take off's 1-bedroom, 1-bedroom, 2 masterbed, 1 bathroom, 2 flexible running to upstairs attic(300sqft).
That was my description of his set up, my questions are do I have the right system or should I have gone with a two stage system? Should he have had installed six take-offs paired in two's all on top of each other. What is the max distance allowed for flex duct, in order to get good air flow to the attic.
I have spent a lot of money on this system and would hate to have problems with please offer any suggestions. I appreciate your feedback