US Air Conditioning Distributors (USACD) is the world's largest privately owned HVAC distributor, with 50 locations in California, Nevada, Utah, Idaho and Arizona. Within its territory, USACD is also the sole distributor of York air conditioning equipment from residential split systems to large tonnage commercial and industrial chillers. In addition, USACD carries an extensive line of equipment and auxiliary products from various manufacturers.

York International was founded in 1885 and today is one of the largest independent manufacturers of air conditioning equipment. In December of 2005, York was acquired by Johnson Controls (NYSE: JCI) to form the largest global provider of integrated products, system and services in the buildings market.

This website is designed to assist Mechanical Engineers in learning about and utilizing York equipment and controls and other USACD products in their HVAC designs and applications.