furnace size

01-09-2012, 10:26 PM	#1
sam mauceri Newbie   Join Date: Jan 2012 Posts: 2	furnace size what size furnace in btu will i need for 3000sq feet home whit good ins.?

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01-09-2012, 10:33 PM	#2
Marty S. Member   Join Date: Oct 2009 Location: Nebraska Posts: 2,298	furnace size Here's a good program for you to do a load calculation with a very reasonable fee. http://www.hvaccomputer.com/main.asp

01-09-2012, 10:47 PM	#3
sam mauceri Newbie   Join Date: Jan 2012 Posts: 2	furnace size Quote: Originally Posted by Marty S. Here's a good program for you to do a load calculation with a very reasonable fee. http://www.hvaccomputer.com/main.asp tnks,but no one do a calculation.they say 80000btu at 95%efficiency should be equaly to my old 100000btu at 80%.

01-09-2012, 11:05 PM	#4
Doc Holliday I'm Your Huckleberry   Join Date: Mar 2011 Posts: 5,087	furnace size The only way to know what size furnace is needed is by way of science ("good insulation" will not cut it), the manual J provided by Marty. It doesn't matter what you had or how it's comparable from 80 or 100 btu's to if it's the wrong size to begin with. You wanted to know and you were told, plain and simple. __________________ Thanks.