Founded in 1953, Johnstone Supply is a cooperative wholesale distributor that serves clients in the heating, ventilation and air conditioning market. The company offers pumps, test instruments and tools, and commercial kitchen, installation and maintenance supplies. It provides products from several manufacturers, including Acme Engineering Products Limited and Arrow Fastener Company. Johnstone Supply also has an online catalog of more than 45,000 products. The company manages over 300 locally owned and operated stores in the United States. It offers adapters, actuators, adhesives, tapes, terminal blocks and thermostats. In addition, the company provides transformers, training materials, tin cleaners, towels and torches. Johnstone Supply offers fans, fireplaces and ignition leads.