Peacha Molus

Peacha Molus is a physics-based greenhouse climate simulator and design optimizer for growers. Describe your growing structure — its shape, cover material, vents, fan, shade cloth, thermal mass, and crop — then describe a day of weather. The model walks the full 24 hours step by step, computing every inside temperature, humidity, and airflow figure from first principles. No lookup tables. No rules of thumb. The built-in scoring system grades your structure A through E across six categories — heat, cold, humidity, condensation, airflow, and energy — using degree-hours as the common currency for how far outside your crop's target band the climate strays and for how long. Drill into any hour of the simulated day to see all eight energy balance terms and understand exactly why the inside temperature moved the way it did. When your score needs improving, the Tune engine searches up to eleven design knobs automatically — roof and side vent area, shade cloth percentage, water barrel count, fan flow rate, cover material, heater output, and more. Each proposed fix shows its isolated and marginal impact, so you can see how changes interact and pick only the improvements that matter to you. For growers who want the model calibrated to their real structure, the built-in Calibration tool fits three parameters against your own thermometer readings: leakage rate, solar transmittance scale, and thermal mass scale. All data stays on your device. No account required.