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[Scott7m]

Yea those numbers seem really out of touch.... 

We'll ask rsi what he's on track for burning this season

[willieG]

i think with what i burn ,10 btu a square foot would be a good average number to use

3000 sqaure feet at 10 btu per square foot = 30,000 per hour = (about) 720,000 per day

lets say my home made is 60 percent efficient so i get 4000 btu out of a pound of wood about 7.5 pounds of wood an hour
180 pounds a day

a cord of oak is 3600 pounds or roughly 20 days a cord

i heat somewhere around 6 months or 180 days


so go back and use 10  and do the math and see what it works out to.i guess you could cut the low estimate in half and see what that domes too? im still not sure this is right but using 10 works out to the wood usage i go through
180 divided by 20 (days per cord) about 9 cords per heating season

depending on the year this is likley very close for me

[kjw58]

I have a GT-220 also into its second season, heating a little over 4500 sq ft in 2 buildings plus DHW.  I easily getting 12-16 hour burn times and I never fill the firebox full.  I think the gt-220 may be a little small for your heat load, and I would check the moisture content of your wood.  Just because its over a year old doesn't mean its dry, especially oak!!.  I have found that if the wood is not stacked where it gets direct sunlight, it will take 2-3 times longer to dry down.  I am burning wood that has been stacked for over 2 yrs and is running 15-18% moisure, and it was dead when I cut it down. Dry wood makes a huge difference in a gassifier!!