Quality comes standard

Since 1974, DWD International has designed, manufactured, installed and maintained HVAC and pressurization systems that withstand the most challenging conditions. DWD was one of the first companies to offer explosion-proof, corrosion-resistant HVAC equipment, and we continue to lead the industry with innovative designs and quality equipment. In 1990, DWD pioneered a variable frequency drive (VFD) pressurization unit that offers 100% stand-by in a single cabinet, minimizing outside-air loads whil...

Since 1974, DWD International has designed, manufactured, installed and maintained HVAC and pressurization systems that withstand the most challenging conditions. DWD was one of the first companies to offer explosion-proof, corrosion-resistant HVAC equipment, and we continue to lead the industry with innovative designs and quality equipment. In 1990, DWD pioneered a variable frequency drive (VFD) pressurization unit that offers 100% stand-by in a single cabinet, minimizing outside-air loads while still meeting NFPA 496 standards.