Dehumidifier sizing calculator

Commercial Dehumidifier Sizing Calculator

Size a commercial dehumidifier review from area, current RH, target RH, temperature, moisture source, drainage, and duty cycle before model review.

Commercial Dehumidifier Sizing Calculator: Estimate a commercial dehumidifier capacity class from area, current RH, target RH, temperature, drainage, duty cycle, and moisture source for basements, storage rooms, cold rooms, gyms, and moisture-sensitive spaces without promising final humidity. The result organizes product, document, and request details; it does not choose a final model.

Updated 2026-06-25

RH humidity context Pts pints/day class Temp operation range Drain condensate path

Moisture load, temperature, drainage, and duty cycle can change product selection.
The result does not promise final RH or moisture performance.

Capacity class = area / 500 x 18 x dampness factor.

Commercial dehumidifier capacity class = area / 500 x 18 x dampness factor. The same square footage can need a different path when current RH, target RH, moisture source, temperature, drainage, or duty cycle changes.

Area: Space area in square feet.
Base rate: 18 pints/day per 500 sq ft.
Dampness factor: Mild 1.0, moderate 1.45, heavy 1.9.

Normalize the space to 500 sq ft blocks.
Apply the base pints/day planning rate.
Multiply by dampness severity and round upward to a practical class.

AdjustmentRounded up to the next 5 pints/day sizing class.

OutputStarts dehumidifier selection before drainage and duty cycle review.

BoundaryThe result is not a final RH promise; low temperature, water intrusion, air leakage, drainage, and ventilation overlap can change the equipment path.

Moisture source

Visible dampness, stored materials, showers nearby, or water entry can change the sizing path.

Describe the source, not just area.

Temperature range

Cool spaces may require different operating review than warm active spaces.

Capture typical and low temperature.

Drainage path

Gravity drain, pump, floor drain, or manual condensate handling can decide package feasibility.

Confirm condensate handling.

Product family Dehumidifiers Dehumidifier result should open a moisture-control review with drainage, temperature, duty cycle, and ventilation overlap attached. Reference Dehumidifier Size Chart Match the result with the closest guide, worksheet, or application page. Product documents Datasheet guide Use the result to request current model documents after the product family is clear. Project request Request review Carry the sizing result into product, document, quantity, voltage, and timeline details.

Space condition	Project facts	Equipment family	Review note
Basement or storage	Area, RH, temperature, drainage, stored material	Dehumidifiers	Drainage and temperature can dominate
Gym or active room	Occupancy, moisture source, temperature, schedule	Dehumidifiers plus ventilation review	Ventilation may also be needed
Warehouse zone	Zone boundary, humidity target, access, electrical	Industrial dehumidifier review	Avoid whole-building assumptions
Utility or equipment room	Heat, moisture, odor, airflow path, service access	Dehumidifier plus fan support	Source control may matter

Air Curtain Series

Ventilation Fan Types

Fresh Air Systems

Exhaust Fan Options

Dehumidifier Options

Commercial Dehumidifier Sizing Calculator

Recommended next step

Moisture source

Temperature range

Drainage path

Moisture Load Matrix