Bathroom Fans by Duct Size

6 In Round Duct	8 In Round Duct	10 In Round Duct	Ductless
3 In Round Duct	3-1/4 x 10 In Duct	4 In Round Duct

Ducting Information

A duct is designed to transfer air between spaces in a building. The ducting inside your bath fan—like any ventilation product—is essential to its success. The Home Ventilation Institute(HVI) recommends that bath fans be ducted to the outside.

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