Michigan Mechanical Closet Door Venting Requirements

 
 

The state of Michigan as of April 9, 2025 has adopted the 2021 Michigan Mechanical Code. This states that with installations being over 200 cfm (dryer) then, the opening needs to have makeup air of at least 100 square inches.

 

Do I need to vent a 36” wide be 84” tall 2-panel MAGIGLIDE bifold closet door in the state of Michigan? NO