Is Tempstar part of Carrier?

Yes, Tempstar is part of Carrier. Tempstar is owned by Carrier Global Corporation, which is one of the largest HVAC manufacturers in the world. Specifically, Tempstar is one of the brands under International Comfort Products or ICP, which is a subsidiary of Carrier. Carrier acquired ICP in 1999, and ICP operates manufacturing facilities in Lewisburg, Tennessee and other locations. ICP produces several brands that share common platforms, components, and engineering, including Tempstar, Heil, Arcoaire, Keeprite, Comfortmaker, and Day and Night. These brands are essentially siblings built in the same factories using many identical internal parts such as compressors, coils, and heat exchangers, but are sold through different distribution channels and positioned at different price points. Carrier itself and Bryant are the premium flagship brands in the Carrier family, while Tempstar, Heil, and others are positioned as mid-tier value brands that offer Carrier engineering at lower cost with fewer premium features. This is similar to how Toyota owns Lexus or General Motors owns multiple brands sharing platforms. So when you buy a Tempstar furnace or air conditioner, you are buying a product engineered by Carrier, manufactured by its ICP subsidiary, with a Carrier-backed warranty, but sold under the Tempstar name through independent distributors rather than Carrier factory dealers.