04-26-2012, 12:23 PM
My split level house is located in New Jersey and was built in 1953. The house will have 6 finished floors when contructions is done. The house currently uses 4 floors (Basement 1, Basement 2, Kitchen, Bedrooms). The current living space for the 4 floors is probably 1,500 sq ft. I just had a 95% 80k 2 ton trane system installed for the bottom 4 floors. I am building a master bedroom in the first attic and an office in the second attic. The master bedroom is 300 sq feet and the second attic is another 150 sq feet. I was told by three HVAC guys that the current system isn't enough to condition the upper two attics. One guy said the heat might work but the air for sure won't work 6 floors above the furnace. My options are to install a seperate furnace and ac for just the top two attic floors or include the existing bedroom floor (11x15 bedroom, 11x11 bedroom and 5x8 bath) also so that all bedrooms will be on the same zone. Question 1. Does it make sense to install new system for just the attic floors or also include the existing bedrooms? Keep in mind the existing bedrooms don't have enough vents. Question 2. My HVAC guy told me that he would get a 70k 2 ton goodman unit but when I told him that I don't like that brand he said he will install a York 60k unit. Will 60k btu and 2 ton work for this space? Not sure why he changed his numbers. The entire attic will be insulated with R30. Thanks for your help.