Call it the big chill: Trane, formerly American Standard, iced its vehicle braking and plumbing operations to concentrate on its air conditioning and heating and ventilation operations. Trane supplies air conditioners to both the residential and commercial markets, and is one of the top global suppliers of HVAC equipment. Products include chillers, air handlers and terminal devices, thermostats and other controls. It also makes energy-efficient systems and filtered air systems that remove allergens and dust. The company sells its products through sales offices and dealers around the world. Trane was acquired by Ingersoll-Rand in 2008 for about $10 billion.