Is $2,200 for a new 80% Trane nat gas furn OK - http://www.hvacmechanic.com/ Forums
Original message
| steppinthrax
 |  "Is $2,200 for a new 80% Trane nat gas furn OK"
, posted Thu 19 Jun 18:02  
Ok this is the deal I have a old ass 62% AFUE 1975 LENNOX nat gas furnace. The A/C is relatively new. The previous homeowners replaced the A/C condensor unit and evap coil. I believe it's about a 2 to 2 1/2 ton unit.
I called some company to do an estimate. He looked at the old units nameplate and said I needed a 80K BTU furnace. I was curious because the output capacity of the furnace is about 65K BTU. I asked him about this and he said you always go by the input BTU??? So he quoted me for a Trane XR80 TVD1B080A936 80K BTU 80% AFUE. The $2,200 price includes the ductwork/labor/furnace and 2 year install warranty.
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Replies:
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| sbrooks157
| "Re(1):Is $2,200 for a new 80% Trane nat gas f" , posted Fri 20 Jun 14:31
Why go by input,imput is how much you put in, you want to know what your getting out to heat your house...How big is your house? If you have a 2.5 ton cooling, I'm assuming the guy who sized that did it right your house should be in the neghborhood of 1000-1200 square feet of conditioned space?Useing a 40k btu Output per 1000 sq foot you need 40k to 48k output... Just my opinion.....:)
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| theduke03
| "Re(1):Is $2,200 for a new 80% Trane nat gas f" , posted Thu 19 Jun 19:02
I'm not familiar with prices in your area but would be a good price in CT. The guy is right, gas furnaces are rated by input capacity. The old one is 65000 output. The new one is 64000 output (80,000 btu x 80% = 64,000btu. You can't get any closer than that!
"My dad was the most feared furnace fighter in Northern Indiana."
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| | steppinthrax
| "Re(2):Is $2,200 for a new 80% Trane nat gas f" , posted Thu 19 Jun 20:05
OK I understand however. I asked him about a price for a 92% eff one and he quoted a XR90 with 60K input that is only like 55K output. Why is this?
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| | theduke03
| "Re(3):Is $2,200 for a new 80% Trane nat gas f" , posted Thu 19 Jun 20:19:
This is because the next size up would be 80,000 x 90% which = 72,000 output. This would possibly be oversized compared to your duct sizes and that is never a good thing.
You could probably get by with a 80k 90% furnace since it's only 7000 btus more than what you have now but that really depends. You will have to trust the judgement of the contractor. Or get a few other opinions from other contractors.
"My dad was the most feared furnace fighter in Northern Indiana."
[this message was edited by theduke03 on Thu 19 Jun 20:28] |
| | tinner73
| "Re(4):Is $2,200 for a new 80% Trane nat gas f" , posted Fri 20 Jun 16:30
where do you live?
union trained in Chicago
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