Use this greenhouse heating feed conversion calculator to turn operational assumptions into a clear planning estimate. Enter the measurements from your project, field, or greenhouse, then review the main result alongside the supporting totals. The calculator keeps the formula visible so you can check units, compare scenarios, and understand exactly which assumptions drive the answer.
“Feed conversion” here converts useful greenhouse heat into the required fuel feed using user-entered efficiency and fuel energy content.
Use the same unit for energy content and fuel price. Fuel properties and delivered efficiencies vary by supplier and equipment.
For 8 MMBtu of useful heat at 82% efficiency and 0.0915 MMBtu per fuel unit, required feed is about 106.62 units. At $2.75 each, cost is $293.22.
The result changes directly with the quantities in the formula. Change one field at a time to see which operating assumption has the largest effect on fuel.
Use the units printed beside each field. Convert measurements before entering them when a different unit is shown, because the built-in constants assume the displayed units.
Run separate scenarios for each period or operating condition, then add the applicable totals. A single blended input can hide important peaks and delays.
No. It includes only the losses, efficiency factors, or allowances shown in the input panel. Add separate allowances for conditions not represented.
Actual performance can differ because of measurement error, weather, equipment condition, work sequencing, material variability, and the quality of the assumptions entered.
| Variable | Required unit |
|---|---|
| Heat demand | MMBtu useful heat |
| Energy content | MMBtu per fuel unit |