Proctor Sales Inc. (PSi) is a sales and technical resource specializing in boiler, steam, and hydronic products in the Pacific Northwest. Founded in 1957, PSi represents top HVAC manufacturers and offers services such as boiler/burner service, backflow calibration, custom fabrication, and training. The company has expanded its capabilities with technical services, fabrication facilities, and authorized service for mechanical equipment. With a focus on energy efficiency and quality equipment, PSi serves residential, commercial, institutional, and industrial markets with a diverse range of products and solutions.