About Us Winsupply of Nashville HVAC is a full-service wholesaler specializing in HVAC, new construction, commercial plumbing, and electrical. We carry a large inventory of high-quality products and serve a variety of customers, from general contractors to specialized technicians, and homebuilders to homebuyers. As a locally owned company within a national organization, we offer not only the pricing and selection of a large supplier, but also the local decision-making and flexibility of a small business. We work hard to do things right, one customer at a time.