Mason-Dallas, Inc. was established on October 23, 1978, as a manufacturers’ representative serving the HVAC industry. Mason Industries of Hauppauge, New York became the foundation of the company’s product offering and remains an important part of Mason-Dallas today.

As customer needs continued to grow, Mason-Dallas expanded its product portfolio with the addition of Hyspan Precision Products. This marked an important step in the company’s continued development and commitment to representing proven, high-quality manufacturers.

Mason-Dallas continued its strategic growth by adding Insul-Pipe Systems, further expanding the range of solutions available to engineers, contractors, facilities and customers throughout the region.

The addition of Griswold Controls strengthened Mason-Dallas’ capabilities within hydronic systems and represented another major milestone in the company’s evolution into a more comprehensive solutions provider.

Building on decades of experience, Mason-Dallas continued to broaden its product offering with respected manufacturers including Mercer Rubber, Hyspan-Barco, Mueller Steam Specialty, Wessels Company, H.O. Trerice, Miro Industries, Advance Products & Support, Carpenter & Paterson, Maid-O'-Mist, Humane Manufacturing, Rapid Positioning Clips, George Koch Sons and others.

Today, Mason-Dallas has evolved far beyond its beginnings as a manufacturers’ representative. The company provides HVAC, hydronic, vibration, seismic and noise control solutions supported by technical expertise, local fabrication capabilities, stocked products and responsive customer service.