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NAICS Code: 423730
423730 NAICS Code for Warm Air Heating and Air-Conditioning Equipment and Supplies Merchant Wholesalers. These businesses listed in 423730 are owned by veterans, service disabled veterans (SDVOSB/DVBE) active duty military, reservists and military spouses of the United States Army, Air Force (USAF), Marine Corps (USMC), Navy (USN) and Coast Guard (USCG).