Iíve been lurking here for the past few weeks trying to learn as much as I can about working with local firms to replace my furnace / heat pump / A/C. Iíd appreciate any guidance or feedback on the system quotes Iíve received.
Iím in Pittsburgh, PA. My house was built in 1945 with an addition completed in the mid-80ís, before we owned it. Square footage of the original structure is 22x25, with a basement (half of which is un-heated/cooled garage), a first and second floor. The addition is 18x25. Total sq footage of heated / cooled area is 1825.
The current furnace is a 1980ís era York, and I think itís like 120,000 or 150,000 BTUs. Weíre very interested in high efficiency and conserving gas and electric resources.
The details for the two providers are:
- TRANE dealer
- Had printout of house dimensions from the local tax assessment web page, so in-house measurements didnít need to be taken.
- FURNACE: TUH080 3 Stage Variable speed; 95% efficient sized at 80,000 BTU.
- A/C / Heat Pump: XL16i 2 Stage A/C with 2 Stage Heat Pump, sized at 36,000 BTU.
- Recommends using existing air filter (April Aire?) but would replace humidifier to better suit the variable speed blowers.
- Includes 10 year parts and labor
- Mentioned that they do a lot of commercial business, and a lot of new residential developments
- CARRIER dealer
- Also had printout of house dimensions from the local tax assessment web page, so in-house measurements didnít need to be taken.
- FURNACE: Carrier Infinity 58MVC080 3 Stage Gas Valve with Variable DC Motor; 96% efficient sized at 80,000 BTU.
- A/C / Heat Pump: 24ANA724 17 SEER sized at 24,000 BTU; Heat Pump is 2 Stage Infinity
- Recommends using existing air filter and humidifier
- Includes 5 year parts, 1 year labor; optional 10 year parts and labor can be purchased.
- Does some commercial and a lot of residential
Both provided options for single stage A/C units, but Iíve only shown the higher SEER rating units here. Both will provide programmable thermostats.
I believe the TRANE has an AC motor and the CARRIER has a DC motor; the CARRIER dealer explained that this would be much more efficient. I have no idea as to how these compare. Does this make a difference in noise or energy efficiency?
Both have positive ratings at the BBB. One has many many positive Angieís List entries, with a few negative experiences; the other has one positive entry and no negative entries.
Iíve read skippedoverís awesome post (here http://hvac-talk.com/vbb/showthread.php?t=177271) but Iím still not sure how I know anything about how good the installers are or how Iíd find that out.
I hope I havenít posted anything inappropriate here, and Iíd really appreciate any help. Iím really hoping to make a decision in the next few days and keep going back and forth between these two firms.