Robertson Heating Supply Company 84 Stewart Ave. Washington PA 15301 has become an industry leader as a supply house of plumbing hydronics kitchen cabinetry and HVAC products. AREAS SERVED: Robertson Supply Company has HVAC supply houses throughout Ohio western Pennsylvania and Michigan. BRANDS CARRIED: Robertson Supply Company offers name brand HVAC supplies from Airtech American Standard Appion Aprilaire Bacharach Beckett Bell & Gossett Bosch Comfort-Aire Dayton Diversitech Emerson General Aire Grundfos Hoffman Honeywell Lenox Little Giant LG Malco Mueller Oatey Packard Panasonic Reactorseal Rheem Ridgid Robinair Sanyo Taco Testo Tjerland White Rodgers as well as many others.