Seal-tite 301-07 Airtite Takeoff 7 Inch Round Duct

Product Description

The SEAL-TITE 301-07 is a 7-inch airtite takeoff fitting designed for round duct systems in residential and commercial HVAC installations. Constructed from heavy-duty galvanized steel, it features a precisely formed collar that creates an airtight seal at the branch connection point, minimizing air leakage and reducing energy loss across the system. The galvanized finish resists corrosion in typical mechanical room and plenum environments. Licensed HVAC technicians install this fitting during trunk-and-branch duct layout or when adding a branch run to an existing supply trunk.

The 301-07 is suited for 7-inch round duct branch takeoffs on forced-air supply or return systems. It fits into both new-construction duct layout and retrofit work where a reliable, low-leakage branch connection is required. The airtite collar design helps systems meet duct leakage requirements common in energy code compliance testing, making it a practical choice for technicians working under Title 24, IECC, or similar energy codes.

Key Features

• 7-inch collar sized for standard round duct and flexible duct connections
• Heavy-duty galvanized steel construction for corrosion resistance and long service life
• Precisely formed airtite collar reduces air leakage at the branch takeoff point
• Supports airflow efficiency and helps meet duct leakage compliance targets
• Suited for both residential and commercial forced-air duct systems

Compatibility

Designed as an OEM-style replacement and new-installation fitting for 7-inch round duct branch takeoff applications in residential and commercial forced-air HVAC systems.

Installation Notes

Installation is performed by licensed HVAC technicians during duct fabrication or retrofit branch work. Power down the air handling unit and verify the system is depressurized before cutting into an existing trunk. Secure the takeoff collar to the trunk with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to maintain airtight integrity. Follow local mechanical codes and SMACNA duct construction standards for fastener spacing and sealing requirements.

Technical Specifications

• Collar Diameter: 7 inches
• Material: Galvanized Steel
• Application: Round Duct Branch Takeoff

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 301-07