Humidifiers

Which humidifier is best for me?

We recommend contacting your local certified HVAC contractor, as they will be able to make recommendations for your home based on its age, size & construction. Overall, you can begin to understand which model might be best for your home using the following:

First, determine how much humidification your home needs, known as Gallons Per Day (GPD):

Use the 3-step formula below

Step One

Calculate the Total Cubic Feet of Home
Total Home Square Footage
X Average Ceiling Height

Step Two

Calculate the Load (lbs/hr)
Total Cubic Feet X Desired Condition Factor (Table Below)
X 1.05 for Each Fireplace

Structures Are Not Equal: Windows, Walls, Celling, Roof

Step Three

Calculate Gallons Per Day (GPD)
Gallons Per Day = Load (lbs/hr) X 2.88

Then, Select Your Unit

Once you have calculated your gallons per day you can then find models that are designed to process that amount of water / accommodate your size of home.

Keep in mind these numbers can vary based on numerous factors, including home construction, the presence and amount of woodwork, if you have a humidor or wine cellar, the presence of fireplaces, the number of floors and more. Work closely with a licensed contractor to determine the best selection for your home.

Steam Model 5500=15 GPD (115V) or 29.5 GPD (230V) up to 5,500 Sq. Ft.

The following flow through models Gallons Per Day ratings are based on 120° plenum temperature.

Evaporative Models 3200A & 3200M = 12 GPD / Up to 3,200 Sq. Ft.
Evaporative Models 4200A & 4200M = 17 GPD / Up to 4,200 Sq. Ft. Evaporative Models 1000A & 1000M = 18 GPD / Up to 3,000 Sq. Ft.
1042LH = 17 GPD / Up to 2,800 Sq. Ft.
1099LHS = 19 GPD / / Up to 3,000 Sq. Ft.
1137 = 19 GPD / Up to 3,000 Sq. Ft.

You might also install more than one humidifier if your home has more than one HVAC system. Many people install a humidifier with each system to reduce the work load on each and more evenly distribute humidification throughout the home.