Seal-tite WK30-20X10RAB Return Air Box 20x10 in

Product Description

The SEAL-TITE WK30-20X10RAB is a return air box designed to connect return duct systems to air handlers or furnaces in residential and light commercial HVAC applications. It features a 20-inch by 10-inch duct opening, sized to match common return air trunk configurations. Licensed HVAC technicians install this component as part of a properly balanced air distribution system, ensuring adequate return airflow back to the equipment. The box provides a clean, structured transition point between the return duct and the air-handling unit.

This return air box is suited for residential forced-air systems where a dedicated return air plenum or cabinet connection is needed. It is appropriate for installations requiring a 20-inch by 10-inch duct interface, fitting into typical stud-bay or framed return-air chase configurations found in new construction and retrofit HVAC projects alike.

Key Features

• 20-inch by 10-inch duct opening fits standard return air duct sizing
• Structured enclosure provides a defined transition between return duct and air handler
• Designed for residential and light commercial forced-air HVAC systems
• Supports proper return airflow balance when installed per system design

Compatibility

Designed as an OEM-style return air box for forced-air HVAC systems requiring a 20-inch by 10-inch duct opening connection.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and ASHRAE guidelines. Power to the air-handling unit must be shut off at the disconnect before beginning any ductwork connection. Seal all joints with approved duct sealant or mastic to prevent air leakage and ensure system efficiency. Verify that the return air box is securely fastened and that the duct opening aligns properly before completing the installation.

Technical Specifications

• Duct Opening Width: 20 inches
• Duct Opening Height: 10 inches

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: WK30-20X10RAB