4 Inch Round Duct Access Door With Rubber Gasket And Galvanized Steel Cover For Airtight Seal In Round Spiral Ducts 3.78 To 4.13 Inches No Fuss Maintenance Access EPDM Gasket Knob 7.08 By 3.15 Inch Panel

Sealed 4-Inch Round Duct Access Door (Single Unit)
✔️ Airtight seal fits 3.78-4.13 in ducts with EPDM gasket

This round duct access door provides a convenient, airtight entry point for HVAC ductwork in round spiral ducts. It’s designed for round spiral ducts and is commonly used in homes, offices, crawl spaces, attics, basements, garages, and industrial facilities for routine maintenance and inspections.

✅ Fits duct diameters 3.78-4.13 in (96-105 mm) for round spiral ducts
✅ Temperature range -22°F to 248°F (-30°C to 120°C)
✅ Includes galvanized steel door panel and EPDM gasket for airtight seal
✅ Tool-free, adjustable-knob installation for quick setup
✅ Ideal for crawl spaces, basements, attics, kitchens, and more

💡 What is a round duct access door used for in HVAC systems? This handy door gives quick service access to circular ductwork, helping with inspections and cleaning without removing duct sections. - For inspection and cleaning of round duct runs (3.78-4.13 in / 96-105 mm) - Keeps air leaks to a minimum with a gasketed, galvanized steel door - Works across a wide temperature range suitable for HVAC environments - Easy, hand-friendly installation using adjustable knobs