§ Chapter 15 IRC 2021
Exhaust Systems
8 entries from Chapter 15 of IRC 2021, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 8 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
M1501.1
Exhaust Must Discharge Outdoors
M1501.1
Can my dryer or bathroom fan vent into the attic instead of outside?
Can my dryer or bathroom fan vent into the attic instead of outside?
→
M1502.3
Dryer Vents Must Terminate Outdoors at an Approved Location
M1502.3
Where can a clothes dryer vent terminate outside the house?
Where can a clothes dryer vent terminate outside the house?
→
M1502.4.1
Dryer Exhaust Ducts Must Be Metal and Smooth Inside
M1502.4.1
Can I use flexible foil duct or plastic pipe for a dryer vent?
Can I use flexible foil duct or plastic pipe for a dryer vent?
→
M1502.4.2
Dryer Ducts Should Not Have Fasteners Protruding Into the Airflow
M1502.4.2
Can dryer vent screws go into the duct?
Can dryer vent screws go into the duct?
→
M1502.4.5
Dryer Vent Length Is Limited by IRC and the Dryer Manufacturer
M1502.4.5
How long can a dryer vent be with elbows?
How long can a dryer vent be with elbows?
→
M1503.3
Range Hoods That Exhaust Must Discharge Outdoors
M1503.3
Does a kitchen range hood have to vent outside?
Does a kitchen range hood have to vent outside?
→
M1504.1
Over-Range Microwave Exhaust Depends on Listing and Installation
M1504.1
Can an over-the-range microwave just recirculate air?
Can an over-the-range microwave just recirculate air?
→
M1505.4
Bathroom Exhaust Fans Must Be Part of a Compliant Ventilation Path
M1505.4
Are bathroom exhaust fans required to vent outside?
Are bathroom exhaust fans required to vent outside?
→
§ 02 Chapter navigation