Humidity Control Sizing

Very rough estimate for humidifier/dehumidifier. Results update in real-time.

The Humidity Control Sizing tool provides a very rough estimate for the capacity of humidifiers or dehumidifiers needed for a space. Proper indoor humidity control is essential for comfort, health, and preserving building materials. This calculator typically considers the room volume, current and target relative humidity (RH) levels, and air change rate (ACH). Additional moisture load factors (e.g., from occupants or processes) can also be included. The output is usually in Pints/Day for dehumidifiers or Lbs/Hour (or GPD) for humidifiers.

Ideal Humidity Ranges: Maintaining proper indoor humidity is key. Most people find 30-60% Relative Humidity (RH) comfortable. Low humidity (<30%) can cause dry skin and irritated sinuses. High humidity (>60%) can foster mold growth and dust mites, and make a space feel muggy. The ideal RH can also vary by season and local climate.

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Important Disclaimer

This calculator uses extremely simplified rule-of-thumb estimations and IS NOT a substitute for proper psychrometric calculations or professional design. Factors like temperature, latent loads, infiltration, and specific equipment performance are critical for accurate sizing. Consult a qualified HVAC professional or use detailed software for reliable humidity control system design.