Hood, Dryer Vent, Alum., 4in. DiversiTech Corporation is North America's largest manufacturer of equipment pads and a leading manufacturer and supplier of components and related products for multiple industries, including: HVACR, electrical, consumer hardware retail, electrical utility, automotive retail and pool and spa channel. We offer high-quality, innovative and advanced products that save time on installations. Combining exceptional customer support with a full line of HVAC parts and accessories, we provide the resources and tools necessary to meet any customer needs.