In 1954 the Nash Ambassador was the first American automobile to have a front-end, fully integrated heating, ventilating, and air-conditioning system.[7][8] The Nash-Kelvinator corporation used its experience in refrigeration to introduce the automobile industry's first compact and affordable, single-unit heating and air conditioning system optional for its Nash models.[9][10] This was the first mass market system with controls on the dash and an electric clutch.[11] This first true refrigerated air conditioner system was also compact and easily serviceable with all of its components installed under the hood or in the cowl area.[ 
Combining heating, cooling, and ventilating, the new air conditioning system for the Nash cars was called the "All-Weather Eye"[13] This followed the marketing name of "Weather Eye" for Nash's fresh-air automotive heating and ventilating system that was first used in 1938.[12] With a single thermostatic control, the Nash passenger compartment air cooling option was described as "a good and remarkably inexpensive" system.[14] Entirely incorporated within the engine bay, the combined heating and cooling system had cold air for passengers enter through dash-mounted vents.[10] Nash's exclusive "remarkable advance" was not only the "sophisticated" unified system, but also its $345 price that beat all other systems.[15]