About 48,000 BTU
You need to have load calculations done. Insulation, windows, location, outside temps, shade conditions, etc. will all affect the answer. For a shop with no windows and very good insulation or in a moderate climate, 48,000 btu may be sufficient. There are heating and cooling load worksheets available on the web if you know the R-value of your insulation and window type.
About 48,000 BTU You need to have load calculations done. Insulation, windows, location, outside temps, shade conditions, etc. will all affect the answer. For a shop with no windows and very good insulation or in a moderate climate, 48,000 btu may be sufficient. There are heating and cooling load worksheets available on the web if you know the R-value of your insulation and window type.
The typical one ...2800 gallons.
One roll is good for 4 squares (400 sq ft) so, 2800 / 400= 7
70% of 2800= 70% * 2800= 0.7 * 2800= 1,960
5% of 2800= 5% * 2800= 0.05 * 2800= 140
36% of 2800 = 36% * 2800 = 0.36 * 2800 = 1008
56020% of 2800= 20% * 2800= 0.20 * 2800= 560
89% of 2800= 89% * 2800= 0.89 * 2800= 2492
% rate:= 7/2800 * 100%= 0.0025 * 100%= 0.25%
2800
2800
2800/1