Exhaust Terminations

Select termination fitting:

that is appropriate for regional weather conditions and installation location

with an integrated collar at least the same diameter as the exhaust duct outlet

with an integrated pest screen with holes no less than 1/4" and no greater than 1/2", except for dryer terminations which will have no pest screen

for kitchen exhaust: made from galvanized steel, stainless steel, or copper

for dryer exhaust: that is designed for dryers exhaust and does not include a pest screen

in very cold climates: that have no backflow dampers or use backflow dampers that resist freezing

Damper must open in the direction of the desired flow

Damper will close when system is off

No damper is required if the system operates continuously

Install termination to exhaust to the outdoors, which does not include unconditioned spaces such as attics and crawl spaces that are ventilated with the outdoors

Install terminations:

A minimum of 3' away from any property line;

A minimum of 3' away from operable opening to houses;

A minimum of 10' away from mechanical intake;

Above the snow-line.

If the termination is at the soffit, seal all soffit vents within 6' of the termination

Cut hole no larger than a 1/4" greater than the termination fitting

Weather seal and flash the exterior fitting

Mechanically fasten termination in place following manufacturer specifications

Do not inhibit damper operation if included in termination

If termination collar is larger than exhaust duct install a rigid metal transition

Seal all duct connections with UL 181B or 181B-M listed materials (e.g., mastic, tape)