Carrier air handlers can be purchased online through websites that specialize in the sale of heating and cooling systems, such as the DCNE Online Catalog and Budget Heating & Air Conditioning. Auction sites such as eBay also frequently feature listings for Carrier air handlers.
An air handler is a device used in conjunction with an outdoor conditioner or heat pump to circulate the air through a home. When the outside unit pulls in air and processes it to increase or decrease the temperature, it pushes the air into the air handler, which is comprised of several components designed to properly prepare the air to be released into the home. Once air has reached the proper temperature based on input form the home's thermostat, the air handler passes air into and out of the home through the home's ducts to achieve the desired internal climate.
Sites such as eBay are frequently used to sell both new and used Carrier air handlers as well as replacement parts. Since the site's inventory varies based on the supply of its users, eBay offers an alert system that can notify users when a new Carrier air handler matching specific criteria is listed on the site.