Henney teamed up with the Trane Company of Lacrosse, Wisconsin and introduced it on the 1938 Model 884 Ambulances. It was powered by a 115 Volt generator coupled to the motor. One of the first models was shipped to McAllen, Texas. It was a one-ton Freon based mechanical system where Packard used the Servel compressor belt-driven by the engine which eliminated the 115 volt generator and motor. This move by Henney was because Sayers and Scovill displayed the first air-conditioned Ambulance in May 1937.