Generalaire 7901 Humidifier Vapor Pad 112 224 440 445

Product Description

The GENERALAIRE 7901 is a replacement vapor pad designed for use with GENERALAIRE whole-home humidifiers. The pad is constructed from coated metal, which promotes optimal water absorption and consistent moisture transfer into the airstream. This component sits inside the humidifier cabinet and is wetted by the water distribution system during operation. As air passes through the saturated pad, moisture evaporates and is delivered to the conditioned space. HVAC technicians and heating contractors routinely replace vapor pads as part of seasonal humidifier maintenance to restore rated humidification output.

This vapor pad fits GENERALAIRE humidifier models 112, 224, 440, 445, and 445A. These are bypass-style and flow-through evaporative humidifiers commonly installed on residential forced-air heating systems. Vapor pads are typically replaced once per heating season or whenever mineral buildup reduces airflow and water absorption efficiency. Regular pad replacement keeps the humidifier operating at its designed capacity and helps prevent scale accumulation inside the unit.

Key Features

• Coated metal pad construction promotes effective water absorption and even moisture evaporation
• Direct replacement for the original vapor pad in compatible GENERALAIRE humidifier models
• Designed to fit correctly within the humidifier cabinet without modification
• Mineral-resistant coating helps extend pad service life under normal water conditions
• Supports consistent humidification output when replaced on a regular maintenance schedule

Compatibility

Designed as a direct OEM-style replacement vapor pad for GENERALAIRE humidifier models 112, 224, 440, 445, and 445A.

Installation Notes

Vapor pad replacement is a routine maintenance task performed by licensed HVAC technicians or qualified service personnel. Before servicing, shut off power to the air handler and close the humidifier water supply valve. Remove the humidifier cabinet cover, slide out the old pad and frame, install the new pad, and reassemble in reverse order. Verify the water panel is properly seated and the distribution tray is clear before restoring power and water supply.

Technical Specifications

• Item Type: Vapor Pad
• Material: Coated Metal
• Compatible Models: 112, 224, 440, 445, 445A

Standard Information

• Brand: GENERALAIRE
• Manufacturer Part Number: 7901