Dehumidifier Sizing Calculator

Moisture Removal (pints/day) is driven by all four inputs at once: Room Area and Ceiling Height multiply together into room volume, while Current Humidity and Target Humidity set the percentage-point gap the equipment has to close (floored at zero — if Target Humidity is set above Current Humidity, the calculator treats there as being no gap to close rather than a negative one). A bigger room means more air volume to dry, and a wider humidity gap means more moisture per cubic foot of that air needs removing, so all four inputs push Moisture Removal in a predictable direction: more area, more ceiling height, or a higher starting humidity all raise it, while raising the target humidity you're drying toward lowers it. Dehumidifiers Needed is Moisture Removal divided by an assumed 100 pints/day-per-unit commercial capacity, rounded up to a whole unit, so it moves in discrete steps rather than smoothly.

Daily Energy Use follows that same step pattern since it's unit count times a fixed 1.5 kWh-per-unit-per-hour assumption times 24 hours — so it only rises when the equipment count actually rises, not with every small increase in the underlying moisture load. Est. Drying Time uses a rougher heuristic tying moisture load to installed capacity and is not claimed here to move in a single consistent direction with any one input, since its interaction with the discrete equipment-count rounding can behave in less predictable ways — treat it as a ballpark planning figure, not a precise schedule, and re-check actual readings as drying progresses rather than relying on the initial estimate.