need help sizing furnace

[gregm]

what size btu furnace is recommended for 2000 sq ft 2 stry house? currently have 80 000 btu which seems like it's on all the time, only 2 yrs old (Payne)

[oldguy2]

you need a heatloss done on it . this will tell the proper size furnace. try doing a heat loss your self go to www.heatload.com it will give you a could ideal

[oldguy2]

should tell you that on that site you need to click on the school pass it will let you in to do your own heatloss

[Zzz]

You really need to include more info. I would not put a furnace into your house with less than 80,000 btu out put if you are talking about a 80% effic furnace that converts to a 100.000 btu furnace minimum for this area.