Exhaust Systems

Bathroom Exhaust Fans Must Be Part of a Compliant Ventilation Path

Are bathroom exhaust fans required to vent outside?

M1505.4

Dryer Ducts Should Not Have Fasteners Protruding Into the Airflow

Can dryer vent screws go into the duct?

M1502.4.2

Dryer Exhaust Ducts Must Be Metal and Smooth Inside

Can I use flexible foil duct or plastic pipe for a dryer vent?

M1502.4.1

Dryer Vent Length Is Limited by IRC and the Dryer Manufacturer

How long can a dryer vent be with elbows?

M1502.4.5

Dryer Vents Must Terminate Outdoors at an Approved Location

Where can a clothes dryer vent terminate outside the house?

M1502.3

Exhaust Must Discharge Outdoors

Can my dryer or bathroom fan vent into the attic instead of outside?

M1501.1

Over-Range Microwave Exhaust Depends on Listing and Installation

Can an over-the-range microwave just recirculate air?

M1504.1

Range Hoods That Exhaust Must Discharge Outdoors

Does a kitchen range hood have to vent outside?

M1503.3