Products We’ve taken the time to design and produce quality HVAC products. Our expert welders carefully craft each order for reliable, precise service in every use. From adapter curves to lined ducts, MTI caters to every HVAC need. « Back to CatalogFan Curb Adapter 18GA Minimum Construction G90 Galvanized Construction Fully Welded Watertight Seams Fully Insulated Optional Galvalume Construction « Back to CatalogFan Curb Adapter 18GA Minimum Construction G90 Galvanized Construction Fully Welded Watertight Seams Fully Insulated Optional Galvalume Construction