§ Chapter 18 IRC 2024
Chimneys and Vents — Mechanical
8 entries from Chapter 18 of IRC 2024, 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
M1801
Natural Draft vs. Power Vent vs. Direct Vent — IRC 2024 Appliance Categories
M1801
What is the difference between natural draft, power vent, and direct vent under IRC 2024?
What is the difference between natural draft, power vent, and direct vent under IRC 2024?
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M1801.1
Condensing Furnace Venting — IRC 2024 Category IV Requirements
M1801.1
What does IRC 2024 require for venting a condensing furnace?
What does IRC 2024 require for venting a condensing furnace?
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M1802.3
Plastic Vent Materials — IRC 2024 M1802.3 PVC and CPVC Requirements
M1802.3
What plastic vent materials are approved for mechanical appliances under IRC 2024?
What plastic vent materials are approved for mechanical appliances under IRC 2024?
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M1803.3
Type B Vent Clearances — IRC 2024 Requirements for Double-Wall Vent Pipe
M1803.3
What are the clearance requirements for Type B double-wall vent pipe under IRC 2024?
What are the clearance requirements for Type B double-wall vent pipe under IRC 2024?
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M1804
Vent Connector Sizing — IRC 2024 Requirements Under M1804
M1804
How do you correctly size a vent connector under IRC 2024?
How do you correctly size a vent connector under IRC 2024?
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M1804.2
Vent Termination Clearances — IRC 2024 Section M1804.2 Requirements
M1804.2
What are the required clearances for mechanical vent terminations under IRC 2024?
What are the required clearances for mechanical vent terminations under IRC 2024?
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M1805
Chimney Liner Requirements — IRC 2024 Orphaned Water Heater After Furnace Upgrade
M1805
When is a chimney liner required under IRC 2024 after replacing a furnace?
When is a chimney liner required under IRC 2024 after replacing a furnace?
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M1805.3
Masonry Chimney Relining — IRC 2024 M1805.3 Requirements for Mechanical Equipment
M1805.3
What does IRC 2024 require when relining a masonry chimney for new mechanical equipment?
What does IRC 2024 require when relining a masonry chimney for new mechanical equipment?
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§ 02 Chapter navigation