Homans Associates 1081 Avenue D Ext Williston VT 5495 now a subsidiary of Watsco Holdings Inc. Homans Associates was founded in 1952 and is based in Wilmington Massachusetts. Homans distributes mechanical insulation and HVAC parts supplies and equipment. Areas Served: Homans Associates operates 18 HVAC supply houses throughout the Northeast. What Brands Does Homans Sell? Homans offers name brand HVAC supplies from Ductmate Hart & Cooley Bryant Johns Mansville Mitsubishi Southwark Duro Dyne Totaline Bristol Carlyle Carrier Copeland Danfoss First Company Honeywell LG Nu-Calgon Payne Raychem Rectorseal Tecumseh and many more.