MAIR

Madison Air Solutions Corporation

A global maker of indoor air quality, HVAC, and airflow equipment, Madison Air Solutions owns brands such as AprilAire humidifiers, Reznor heaters, and Big Ass Fans. Founded in 2017 by Larry Gies of Madison Industries in Chicago, it was assembled by buying established ventilation brands and gathering them under one roof. One of those brands, Big Ass Fans, started in 1999 selling large slow-turning fans to dairy farmers and earned its name when customers kept calling the maker "the guys with those big ass fans."