scope:

This standard applies to the construction, performance and installation procedures for a newly produced automatic vent damper device, hereinafter referred to as device, constructed entirely of new, unused parts and materials and designed to form a section of the vent connector from an individual, automatically operated, gas-fired appliance equipped with a draft hood(s).

A device covered by this standard is for installation on a gas-fired appliance listed by a nationally recognized testing agency.

A device covered by this standard shall have an inlet and outlet venting area each no greater than that of a vent connector having a nominal 12 inch diameter (113 square inches).

Additional provisions specific to electrically operated automatic vent damper devices are outlined under Part III.

Additional provisions specific to mechanically actuated automatic vent damper devices are outlined under Part V.

Additional provisions specific to thermally actuated automatic vent damper devices are outlined under Part VII.