Water fed to plants per day

Total irrigation for the whole room. Plants transpire about 90% of it back into the air.

Floor area

Room sealing Sealed room, no exhaust (add 0.05 pints per sq ft) Average, some air exchange (add 0.15) Leaky, humid climate, or open intake (add 0.3)

Wet weight hung to dry

Drying time

Most of the water comes off in the first 3 days, so the result is sized for that peak, not the average.