Exhaust Systems

IRC 2024 Bathroom Exhaust Duct: Material, Termination, and Insulation Requirements

What are the IRC 2024 requirements for bathroom exhaust fan duct material, termination, and insulation?

M1507.2

IRC 2024 Bathroom Exhaust Termination: Venting to Exterior, Not to Attic

Where must a bathroom exhaust fan terminate under IRC 2024?

M1501.1

IRC 2024 Crawl Space Exhaust: When Mechanical Ventilation Replaces Passive Vents

When does IRC 2024 require a mechanical exhaust fan in a crawl space instead of passive foundation vents?

R408.2

IRC 2024 Dryer Exhaust: Rigid Metal Duct, 25-Foot Maximum, and Screen-Free Cap

What does IRC 2024 require for clothes dryer exhaust duct material, length, and termination?

M1502.4

IRC 2024 Dryer Vent Outdoor Termination: Location, Damper, and Screen Prohibition

Where must a clothes dryer vent terminate under IRC 2024 and can it have a screen?

M1502.3

IRC 2024 Exhaust Fan Sizing: CFM by Room Size and Use

How do you size an exhaust fan to meet IRC 2024 CFM requirements by room type?

M1507

IRC 2024 High-Performance Residential Kitchen Exhaust: When Residential Rules Apply

Does IRC 2024 apply to high-BTU residential ranges, and how do you calculate the right hood CFM?

M1503

IRC 2024 Kitchen Exhaust Duct: Smooth Metal, Maximum Length, and Exterior Termination

What does IRC 2024 require for kitchen exhaust ducts?

M1503.1

IRC 2024 Kitchen Range Hood Exhaust: Minimum CFM, Duct Size, and Grease Filter Rules

What does IRC 2024 require for kitchen range hood exhaust duct size, CFM, and grease filters?

M1503

IRC 2024 Makeup Air: Preventing Backdrafting from Large Exhaust Fans

When does IRC 2024 require makeup air for a range hood or exhaust fan?

M1503.4

IRC 2024 Powered Attic Ventilators: Requirements and Energy Code Controversy

Are powered attic ventilators permitted by IRC 2024, and what controls are required?

R806.4

IRC 2024 Radon Mitigation: Passive Stack Required in High-Risk Zones

Does IRC 2024 require a radon mitigation system in new homes?

R.Appendix F

IRC 2024 Range Hood CFM: Minimum Airflow and Makeup Air Threshold

What CFM is required for a range hood under IRC 2024, and when is makeup air required?

M1503.3

IRC 2024 Toilet Room Ventilation: When a Half-Bath Needs an Exhaust Fan

Does a half-bath or powder room need an exhaust fan under IRC 2024?

M1507.4

IRC 2024 Whole-House Exhaust Fans: Energy Code Limits and Backdraft Dampers

What does IRC 2024 require for whole-house exhaust fans including backdraft dampers and energy controls?

M1507.3

IRC 2024 Whole-House Mechanical Ventilation: Continuous vs Intermittent Operation

What does IRC 2024 require for whole-house mechanical ventilation in new homes?

M1507.3