Humidifier Capacity Calculator

Enter a value in each of the requested fields. Once you have calculated the "Load / Gallons Per Day" for your home, select from steam, flow through or drum humidifier models that are designed to generate the Gallons Per Day your home needs.

The first two entries (Outside Temperature and Outside RH) will be based on your Location Selection (state and closest city) to the right in the shaded box.

Outdoor / Indoor Conditions

Outside Temperature (F°): These variables are found based on your location. Select your location in the dropdown on the right.

Outside RH (%): See selection chart to the right for your region

Inside Temperature (F°): What is your desired indoor temperature?

Inside RH (%): What percent humidity do you wish to maintain?

Location

Outside Temperature

Outside RH

Choose one of the three RH variables given and enter it into the calculator on the left.

7:30 am	1:30 pm	7:30 pm
--	--	--

Whole-House Humidity Load Calculation

Total Conditioned Square Feet (ft²): What is your home's total square feet?

Average Ceiling Height (ft): What is your home's average ceiling height?

Air changes per hour: See selection chart to the right for input factor

Number of Chimney Fireplaces: Traditional flue-type, vented fireplaces

Build Type	Air Changes	Example
Average/Default	0.5	Standard Factor to be used in residential humidity load calculation
Older Uninsulated Home	0.75 to 1.00	Homes with single pane windows, little insulation, historic and farm homes
Newer Home Construction	0.35	Select only when air infiltration has been verified as 0.35 or less

Results

Load (lbs/hr): --

Gallons Per Day: --