Air System Components Inc. is a market-leading supplier of heating, air conditioning and ventilation system components for commercial and residential applications.

Located in Richardson, TX, ASC is home to multiple brands that operate as independent companies. The Titus, Krueger, and Tuttle & Bailey brands have been major market forces selling grilles, registers, diffusers, and terminal units. Penn Ventilation and Barry Blower brands merged to form PennBarry, selling commercial and industrial fans and blowers. Under the management of PennBarry is a specific kitchen line of exhaust fans and blowers is SupremeFan. The Superior Rex brand focuses on fan coils and related products, while Reliable's strength is in it's unique line of grilles,registers, diffusers, and louvers. Most recently, ASC acquired Trion Indoor Air Quality, which is home to the Trion, Envirco, and Herrmidifier brands. These brands complement the existing lines of air distribution products, but focus on clean room and/or humidification for both residential and commercial applications.