Dehumidification Calculator
Estimate moisture loads and size your dehumidifier for controlled environments
Room & Units
Positive value only.
Positive value only.
Positive value only.
Environmental Conditions
Hours per day the lights are on.
Average exchange with outside air.
Irrigation & Free Standing Water
Total water applied per day (all plants).
If unknown, use the volume field below and we’ll calculate this.
We’ll estimate % of irrigation when both fields are provided.
Evapotranspiration (Media, Reservoirs & Plants)
% of irrigation that evaporates directly from media surfaces.
Uses media type, area & VPD to estimate media evaporation.
Include evaporation from open reservoirs, tanks or sumps.
Estimated evaporation from reservoirs and tanks.
Moisture released from plants. Auto-calculated if enabled.
Uses canopy area, crop factor (Kc), VPD and irrigation to estimate transpiration.
Advanced & Safety
Approx. extra moisture from humidifiers, foggers, or other sources.
Convection scales media & reservoir evaporation. “Typical” matches the calibrated base rates.
Share of plant transpiration occurring while lights are on (stomata close at night).
Nameplate pints/L are quoted at these conditions; output is derated to your room.
Buffer for swings, crop growth & model uncertainty.
When on, ventilating with drier outdoor air reduces the dehumidification load.
Results show average loads – always round up to the next dehumidifier size.