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Greenhouse Heating Yield Forecast Estimator

The Greenhouse Heating Yield Forecast Estimator projects marketable crop output for a heated greenhouse from growing area, baseline yield, production cycles, heating performance, and expected crop loss. It is designed for growers comparing seasonal production plans, estimating annual throughput, or checking how a reduced heating-performance assumption may affect a crop forecast.

The model starts with a full-performance yield baseline and then applies two explicit adjustments: a heating performance factor and a marketable-yield retention factor. That keeps the estimate transparent: you can separate the production potential of the planted area from the penalties you choose to apply. The result is a planning estimate rather than a biological guarantee, so crop variety, light, disease, spacing, temperature strategy, and harvest standards should be reflected in the baseline yield or loss assumption where possible.

Production assumptions

sq ft
lb/sq ft
cycles
%
%
Result
—
forecast marketable yield per year
Full-performance annual yield—
Heating-adjusted yield—
Marketable retention—
Yield per growing sq ft—

1. Enter growing area
Use the actively cropped greenhouse floor or bench area represented by your yield baseline.

2. Set the baseline yield
Enter expected harvest weight per square foot for one crop cycle before heating or loss adjustments.

3. Add annual cycles
Use the number of complete crop cycles expected in the forecast year.

4. Apply heating performance
Use 100% when the baseline already represents the planned heating condition; reduce or increase it only when you intentionally want a proportional scenario adjustment.

5. Allow for non-marketable crop
Enter the share expected to be culled, damaged, or otherwise not sold.

6. Review the forecast
Compare the marketable annual yield with the unadjusted and heating-adjusted values in the result panel.

Full-performance yield = Area × Baseline yield per cycle × Cycles Heating-adjusted yield = Full-performance yield × (Heating factor ÷ 100) Marketable yield = Heating-adjusted yield × (1 − Loss % ÷ 100)

What the result means

The main result is the projected marketable harvest weight for the full year under the entered proportional assumptions.

A heating factor is a scenario multiplier, not a physics-based heat-loss model; use a baseline yield that matches your crop and production method.

Given: 1,200 sq ft, 2.8 lb/sq ft per cycle, 4 cycles, 96% heating factor, and 7% non-marketable loss.

Calculation: Full yield = 1,200 × 2.8 × 4 = 13,440 lb. Heating-adjusted yield = 13,440 × 0.96 = 12,902.4 lb. Marketable yield = 12,902.4 × 0.93 = 11,999.2 lb.

Result: About 11,999 lb of marketable crop per year.

The forecast represents approximately 10.0 lb of marketable crop per growing square foot per year.

Should the heating performance factor be a measured efficiency?

Not necessarily. In this calculator it is a planning multiplier applied to the baseline yield, not boiler combustion efficiency. Use 100% when your baseline yield already reflects the planned greenhouse conditions.

Can I use kilograms instead of pounds?

Yes, if the baseline yield and final yield are interpreted in the same weight unit. The interface labels pounds, so convert inputs first if you need kilogram-labeled output.

What belongs in the crop-loss percentage?

Include the portion of expected harvest that will not be marketable, such as grading rejects or crop damage, if those losses are not already embedded in your baseline yield.

Why can the heating factor exceed 100%?

Values above 100% allow a scenario where improved heating conditions are assumed to raise output relative to the baseline. Keep the factor tied to a defensible production assumption rather than treating it as a guaranteed gain.

How is this different from an energy cost estimate?

This estimator focuses on crop output. The Greenhouse Heating Energy Cost Estimator uses equipment power, runtime, and electricity price to estimate operating expense.