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1. With comparable pricing, should I go with Rheem 1-stage 90% furnace or 2-stage 80% efficiency model?

2. A contractor told me a downflow furnace costs more than an upflow equivalent model. My furnace is located in a laundry room closet. Does it make money sense to have the replacement installed in the crawl space or attic? 3. An online sizing estimate - input sq footage (1,750) & zip code and the result revealed that I need a 3 ton AC and 59,000 BTU. The contract quoted me Rheem RAPM02JEZ, 3.5 ton/14.5 seer/RGTM09EZAJS90BTHU95%. He said the number he wrote was input heat, online result must be output. I have no idea how to equate input/output...Just want to know if he sized the units adequately??

Public Comments

1. The a/c size is based on the size of you house/condo/townhome/trailer etc... The difference in a high efficency decision depends on if you can wait until the payback in electricty savings is o.k. with you. Both units will heat and cool the same, only the high efficency will do it with a lot less electricity, but it costs alot more. As for the sizing there is a general guidelines based on size as a rule of thumb. it is also based on where you live, with heating cooling historical needs. An oversized furnace may work fine, you can stop heating. But an oversized a/c unit will not work, it will cool the place down to quickly without removing the humidity.
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