FullCalculator

Humidifier Sizing Calculator

Whole House Humidifier

Calculate humidifier capacity for your home

Formula

Capacity (gal/day) based on home volume, air changes, target humidity, and temperature differential

Frequently Asked Questions

What size humidifier do I need?
Home size and construction determine capacity. A 2,000 sq ft average home typically needs 12-17 gallons per day. Loose construction or very cold climates need more.
What humidity level should I maintain?
Aim for 30-50% relative humidity indoors. In very cold weather, lower the target to 25-30% to prevent condensation on windows.

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