This industry comprises establishments primarily engaged in the merchant wholesale distribution of warm air heating and air-conditioning equipment and supplies.

Cross-References. Establishments primarily engaged in--

Merchant wholesale distribution of household-type electrical appliances and room air-conditioners--are classified in U.S. Industry 423620, Electrical and Electronic Appliance, Television, and Radio Set Merchant Wholesalers;

Merchant wholesale distribution of hydronic heating equipment--are classified in U.S. Industry 423720, Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers; and

Selling and installing warm air heating and air-conditioning equipment--are classified in Industry 238220, Plumbing, Heating, and Air-Conditioning Contractors.