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Heating & Cooling

Furnace BTU's for most efficienty

I need to calculate necessary BTU's for natural gas, forced air furnace. Need replacement, must be upflow/multi-positional with variable speed fan. I would like to know the formula to calculate BTU's necessary for most energy savings.
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Posted 2016-10-02T17:32:14+0000  by Ardie Ardie
 
Hello Ardie.

Well, it's not just a simple formula.  The process of sizing a proper furnace to a home is a lengthy and tedious manual process.  Shortcuts using professional software are rather expensive, but there is one option you might want to look at:

https://www.coolcalc.com/products/manual-j

Chris.

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Posted 2016-10-13T16:35:08+0000  by Chris_HD_CHI
 
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