Inputs
m²
m
%
%
°C
L/day
Results
Rough Recovery Window
—
Planning Summary
Calculation Details
Show intermediate values
Water to remove: —
Effective removal rate: —
How This Estimate Works
- Internally, units are converted to SI. Capacity is reduced using conservative derating factors for temperature, leakage, and continuous moisture sources.
- The “water to remove” estimate uses a broad empirical range plus a moisture-scenario adjustment to reflect simple air drying, laundry spikes, or stored moisture in materials.
- Because real homes buffer moisture very differently, this tool is best used as a planning window, not a guaranteed finish time.
Frequently Asked Drying-Time Questions
How long does a dehumidifier take to lower humidity?
A correctly sized unit usually brings a room from 65% down to 50% RH within hours. Total drying time depends on room volume, how wet the air is, leakage, and whether stored moisture in walls and contents keeps re-wetting the air.
Why is my dehumidifier not lowering humidity fast enough?
The most common reasons are an undersized unit, open windows or high leakage, a continuous moisture source, or a room colder than the unit's operating range. Fix the source and the enclosure before buying a bigger machine.
Should I run the dehumidifier 24/7 after a leak?
For the first days after a water event, continuous running is usually the right call while surfaces dry out. Once the air stabilizes at your target RH, switch to the normal schedule to avoid wasting energy.