Can't completely disagree with that, but think it's important to note that you can control the rate at which those 40lbs release their heat. In order to have an efficient burn (on the low end) and a safe burn (on the high end), however, your control is limited.Seasoned Oak said:BrotherBart said:On the burn time question, I put around 40 pounds of dry oak in the 30 at nine o'clock last night. Slept late and at nine thirty this morning the stove was at 300 and plenty of coals to reload. It was cruising at 550 when I went to bed at eleven. Got down to twenty eight last night and upstairs was 70 and downstairs 73 when I finally got out of the sack.
You mileage is guaranteed to vary.
A big factor from house to house is the insulation factor as well, 40Lbs of wood would cook you out of a really tight well insulated house,were a poorly insulated house would still be struggling to get warm.
Your insulation factor will surely vary.
For example, I wouldn't expect a 500sq foot cottage to be able to use that forty pounds efficiently for a 36 hour burn, or a big house to be able to burn through all 40lbs in 3 hours without exploding the stove.