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Question DetailsAsked on 4/2/2015

furnace btus for 2500 sf house in dallas?

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You can find some ballpark cost info and general thoughts on types and brands in the Home > HVAC link in Browse Projects, at lower left.


For BTU's it depends on your home layout (sprawling ranch or compact 3 story), whether you have a basement or not, insulation quality, percentage of window area, etc - but for a VERY rough ballpark you can go to this site and run the calculator.


I would expect for that area something around 30-40,000 Btu will be the manual result for a normal 2000SF range house, or maybe up to 50,000 if you want it designed to maintain full 70+ degree temp in the most extreme weather of record. Usually a furnace is NOT sized for the most extreme conditions - the presumption is that in the coldest weather day or two of the year that you can accept a slightly cooler temperature or a slightly overworked furnace - so for instance in Dallas the uniform residential code calls for a design low temp of 22 degrees and a high of 100, even though the record low and high are 1 and 112 degrees respectively.


http://www.alpinehomeair.com/hc/calcu...


However, come bid time, you need to have the ACCA Manual J calculation run which determines the requires heating/cooling load. Then Manual S figures the unit sizing to fulfill that need (taking into account unit efficiency and such), and Manual D figures ducting requirements (assuming forced air) to deliver that to the rooms.

Answered 4 years ago by LCD




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