Greenhouse Energy Cost Calculator
Greenhouse Energy Cost
Estimate monthly and annual heating and cooling energy costs for a greenhouse based on dimensions, climate zone, and covering material.
Formula
Heat Loss (BTU/hr) = Surface Area x U-Factor x Temperature Difference; Monthly Fuel = BTU/hr x 24 x 30 / BTU per Gallon; Annual Cost = Monthly Cost x Heating Months
Frequently Asked Questions
How can I reduce greenhouse heating costs?
Use double-layer poly or polycarbonate covering, add thermal curtains, seal air leaks, use thermal mass like water barrels, and consider zone heating. Double poly can reduce costs by 30 to 40 percent versus single layer.
What temperature should a greenhouse be?
Most vegetables and flowers grow best at 65 to 75 degrees F during the day and 55 to 65 degrees F at night. Cool-season crops can be grown at 50 to 60 degrees F.
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