An air conditioner is nothing but a sum of its parts, with Air System Components (ASC) supplying the parts. Air System Components, Inc. manufactures components, such as grilles, registers, diffusers, and terminal devices for air conditioning, heating and ventilation systems, in addition to fans and other air distribution products. ASC's products are used in industrial facilities, institutions, and commercial and residential buildings, as well as the International Space Station. Brands include Titus, Krueger, Tuttle & Bailey, Reliable, Superior Rex, and PennBarry. Products are available worldwide through a network of wholesalers and distributors. ASC, which has about 10 manufacturing facilities, is a subsidiary of Tomkins.