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Old 04-09-2016, 02:25 PM   #8427
devilcup
Arch-Supremacy Member
 
Join Date: Feb 2001
Posts: 16,060
I am wondering which is more accurate?

1) http://www.wikihow.com/Calculate-BTU-Per-Square-Foot

or

2) http://residentialairconsg.blogspot....nstalling.html

it seems like option 1 is widely found in the internet.
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