Duct Systems

IRC 2024 Air Handler Installation: Drain Pan, Condensate Line, and Access Requirements

What does IRC 2024 require for air handler installation in an attic, including drain pan, condensate line slope, and working clearances?

M1401

IRC 2024 Dryer Duct vs HVAC Duct: Why They Cannot Share the Same Ductwork

Can a clothes dryer share ductwork with the HVAC system, and what does IRC 2024 say about dryer duct separation?

M1601.1

IRC 2024 Duct Insulation: R-6 Minimum for Ducts in Unconditioned Spaces

What insulation R-value does IRC 2024 require for HVAC ducts in attics, crawl spaces, and other unconditioned areas?

M1601.3

IRC 2024 Duct Sealing: Mastic or Listed Tape Required at All Joints

What does IRC 2024 require for sealing duct joints and seams, and is regular duct tape acceptable?

M1601.4

IRC 2024 Flex Duct Installation: Length Limits and Support Requirements

What are the IRC 2024 rules for flexible duct installation, including maximum length, bend limits, and support spacing?

M1601.1

IRC 2024 HVAC Ducts in Garage: Prohibited Return Air and Fire Separation Rules

What does IRC 2024 require for HVAC ductwork that runs through or is located in an attached garage?

M1602.2

IRC 2024 Return Air: Minimum Return Capacity and Door Undercut Rules

What does IRC 2024 require for return air capacity, and how must return air be provided to closed rooms?

M1602

IRC 2024 Supply Air Grille Placement: Under Windows and Exterior Walls for Comfort

Where does IRC 2024 require supply air registers to be placed, and why does perimeter placement matter for comfort?

M1601.1