Fire Damper Access Door Size

The minimum access door should be 18 by 16 inches 457 by 406 mm when duct size permits.

Fire damper access door size.

O where fire dampers are too large to allow them to be reset and the fusible link replaced from outside the duct the access doors should be increased to at least 24 inches x 16 inches in size to allow a person to enter the duct. With over 50 years of experience in the hvac industry we have inspected thousands of fire and smoke dampers. O where the size of the duct permits access doors should be at least 18 inches x 16 inches in size. Ruskin has a wide variety of doors to meet different duct styles and application needs.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. For dampers that are too large for an ordinary person s arm to reach from the outside of the duct to reset the damper and replace the link the access size should be 24 by 16 inches 610 by 406 mm to allow a person to enter the duct. They were always way too small to perform meaningful inspections maintenance was next to impossible and the edges were often sharp and unsafe. Leminar range of duct access doors has been designed to allow easy and convenient access to the equipments within hvac ductwork while providing a secure positive seal when closed.

22g galvanised steel flanged frame for strength. 1 inch thick insulation. The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round. Access doors are designed to provide entry to ductwork to access fire products.