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Old 10-14-2011, 11:41 AM   #1
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size gas furnace for house


I have a 1275 square foot house in southern Colorado. What is the proper size furnace?

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Old 10-14-2011, 12:05 PM   #2
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size gas furnace for house


Hello ispect and welcome to the best DIY'r site on the web.

To size a system properly you should do what is know as a "Manual J" this will provide you with the BTU loss/gain, gain being related to AC. Search the web for a Manual J download one time use at about $50.

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Old 10-14-2011, 02:41 PM   #3
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size gas furnace for house


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Originally Posted by Jackofall1 View Post
Hello ispect and welcome to the best DIY'r site on the web.

To size a system properly you should do what is know as a "Manual J" this will provide you with the BTU loss/gain, gain being related to AC. Search the web for a Manual J download one time use at about $50.

Mark
That would be hvaccomputer.com
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