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| My current heat pump finally shot craps, so I'm replacing. I got three quotes. I decided to go with a great company that has a great reputation. They were the only quote to measure, inspect, and run calculations on a computer program.
So to the question. We live on the southern Oregon coast...weather is very moderate (30 - 60 degrees F) is normal and close to the extremes. The home is 3000 square feet (measured by them at 2800). The current system is a 4 ton pump/4 ton handler (Trane). The company quoted a 3.5 ton Trane XL15 pump/4 ton variable speed handler. Does this sound right for such a large house? I guess it all goes back to the weather here...not that extreme. Just wanted some expert thoughts!
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Follow-Up Postings:
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- Posted by tigerdunes (My Page) on Fri, Oct 21, 11 at 7:21
| Paleo Did your dealer perform a load calculation and if so did he give you a copy of the results on the software letterhead to support his size recommendation? How did your old system perform? Any problems heating and/or cooling? How would you describe your home's building envelope and insulation qualities? these are the minimum specs you should be looking for. 15 SEER, 12.5+ EER, 9 HSPF you want a thorough inspection of your ductwork system. size, overall condition, supply and return lines, insulation qualities, leak test, etc. any hot/cold spot issues in your home should be addressed. My personal recommendation is Trane/AmStd, Rudd/Rheem, and Carrier/Bryant. Depending on your location, I would not purchase a new system that did not have electronic demand defrost. IMO |
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- Posted by neohioheatpump (My Page) on Fri, Oct 21, 11 at 12:02
| How did the old 4 ton handle the extremes in temps? I would think 4 ton for your size home. |
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| If the size of the old unit was adequate you have ruin the test. no matter how you run a Manual J to size a system for an existing structure there are numerous places that errors can creep in. the actual R-value of the walls and ceilings must be estimated, and infiltration losses (often the largest source of loss) must be estimated unless you run a blower door test. |
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