(800)865-5931 Closed Thur 11/26 - Sun 11/29, Reopen Mon 11/30 8am, CT
Free Shipping See Details
No Sales Tax See Details
Enter your zip for personalized product and service recommendations.
Actual product may vary from photos.

GeneralAire 1137

Legacy Series 120V Fan Power Fan Humidifier with Manual Control

(2 Reviews)


    • Shipping to Canada

      Canadian tax and shipping fees may be estimated prior to purchasing an item by completing the form below.

      Duties (%): N/A
      Canada Tax (%): N/A
      Brokerage: N/A
      Total taxes: N/A
      Quantity: Postal Code:
    • Pro Installation
A fan inside your GeneralAire® Elite Series Flow Through 1137 pulls warm air from your furnace through the water-soaked Vapor Pad®, where it absorbs additional moisture.  The moistened air then returns for distribution throughout your home via your home's duct system.  Newly-moistened and healthier air is provided to you and your family.
  • For Home Sizes up to 3,000 Sq. Ft.
  • Included:  The MHX3 Manual-Control Duct Mount Humidistat.
  • 21 GPD.
  • Vapor Pad® replacement number 990-13 (GFI #7002). Replace 1-2 times per season.
  • 120V.
  • 19 Lbs.
  • 5 Year Warranty
Click Here to watch a video demonstrating how to change your Vapor Pad

Included in the GeneralAire 1137 Box:
  • Humidifier
  • Humidistat
  • Installation Instructions
  • Vapor Pad®
  • Parts Kit
  • Water Tube Kit
  • Humidistat Wire
  • Drain Pan
  • Power Supply Cord
  • Water Distribution Trough 

The two main types of standard humidifiers are the bypass and power fan.

Bypass humidifiers can be installed on either the supply or return plenum and you run a bypass duct to the plenum the unit isn't installed on.

Power-Fan humidifiers can be installed on a vertical run of either the supply or return plenum and uses a fan to distribute humidity into the air stream.

Maximum Coverage Area

Maximum coverage area means this humidifier will perform well for home sizes up to the square footage indicated, provided that the home is “tight." A "tight" home is typically one that is sealed well around windows and doors and does not leak air to/from the outdoors.

Maximum Coverage Area
3000 Square Feet
Water Capacity (GPD)

The amount of water vapor that can be delivered into the home, measured in gallons per day (GPD), that the humidifier can deliver into the space.

Water Capacity (GPD)
21 Gallons/Day
Electrical Requirements

The electrical requirements either 24 volts (bypass humidifiers) or 120 volts (power fan humidifiers) that needs to be supplied to the unit.

Electrical Requirements
120 Volts
Bypass Duct Diameter
6 inches
Plenum Opening Size
15W x 9 1/2H inches
16 Inches
14 Inches
Limited Warranty
5 Years