MRC Heating & Air, 14770 Firestone Blvd, Ste 214, La Mirada, CA 90638, US

Founded in 1982, Omni Duct Systems specializes in fabricating and shipping round, rectangular and oval HVAC ductwork directly to large commercial jobsites across the United States. The company is one of the largest, fully automated open shops in the country. It has two Lockformer coil lines, six 22-inch plasma cutters and four spiral machines capable of producing more than 200,000 pounds of duct and fittings per day. Omni products include spiral pipe, round fittings, rectangular ducts and fittings, oval ducts and fittings, grease ducts, flex ducts, air distribution systems and sealants and tapes. Omni maintains more than 2 million pounds of steel in its facilities at all times to assure quick turn-around manufacturing capabilities are never compromised. Omni Duct Systems is headquartered in Anaheim, Calif., and the company maintains branch offices in Sacramento, Ontario and Santee, Calif.

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