Articles on Ventilation
Bathroom Exhaust Fan Duct Termination Code in Minnesota
Wrong termination causes attic mold even with a properly sized fan. Learn the IRC and Minnesota code rules for roof caps, wall caps, soffits, and dampers.
10 min read
Humidity Sensing Bathroom Fan Installation: Switch Loop Trap
Planning a humidity sensing bathroom fan installation? Learn the switch loop wiring problem, Minnesota permit rules, and three paths to get it right.
10 min read
Bathroom Exhaust Fan Size Calculator: Get the CFM Right
Use the right bathroom exhaust fan size calculator for your Twin Cities home. HVI CFM formulas, duct derating, MN code, and permit guidance included.
10 min read