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. With over 50 years of experience in the hvac industry we have inspected thousands of fire and smoke dampers. 22g galvanised steel flanged frame for strength. 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. O where the size of the duct permits access doors should be at least 18 inches x 16 inches in size.

Ruskin access doors enable access into ducts without compromising safety or ventilation. 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. Over the years we discovered many deficiencies with small damper access openings. 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.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. Access doors are designed to provide entry to ductwork to access fire products. Ruskin has a wide variety of doors to meet different duct styles and application needs. Double skinned 24 g galvanised door panel.