Greenhouse Heater Calculator |
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If you live in a cool region, you'll probably need to purchase a greenhouse heater. Heaters are rated by the amount of BTU's they produce. In order to determine the correct size of greenhouse heater needed for your greenhouse, you'll first need to gather some information on the size of your greenhouse, the minimum outside temperature you expect for your area, and the minimum temperature you want to maintain in your hobby greenhouse. Read more about heating your greenhouse. Use the JavaScript Greenhouse Heater BTU Calculator to determine your needs: |
Greenhouse Covering U-Values
Greenhouse Covering | U-Value |
5mm Solexx Panels | 0.43 |
3.5mm Solexx Panels | 0.48 |
8mm Triple Wall Polycarbonate | 0.50 |
Double Pane Storm Windows | 0.50 |
10mm Twin-Wall Polycarbonate | 0.53 |
8mm Twin-Wall Polycarbonate | 0.63 |
6mm Twin-Wall Polycarbonate | 0.65 |
4mm Twin-Wall Polycarbonate | 0.70 |
Single Pane Glass, 3mm | 1.05 |
Poly Film, 6mm | 1.20 |