What's a "rough cost" of adding storage to a gassifier aside from the cost of the tanks? I'm weighing the option of buying a 1000 gallon pressurized tank for use with my econoburn 100. However, with my homes heat loss calculated at 50,000 BTU/Hr, if I am correct, an 8 hour burn should yield 8 hours of useable hot water with a delta T of 50 degrees (190-140)? Effectively cutting my wood consumption in half. 1000 gallons @ 50 degree Delta T = approx. 400,000 BTU's 400,000 BTU / 50,000 = approx. 8 hrs. To charge: 50,000 BTU (net output after house load) would take 8 hrs. to charge to 400,000 BTU Obviously I would see better results in warmer weather. Any thoughts?