Custom Duct Heater Manufacturing and Repair. We can custom design any size wattage and configuration. Fast lead times as we can bypass ceramic mold manf. with the use of our  rigidized refractory board customization up to (2300F)  custom nichrome wire guage and coils. quick turn around on all designs and construction.  take a look at pictures below from Invista Nylon Plant job  (custom designed in 7 days) constructed in 7 days. 24pcs total wattage 265volt  300,000 watts system for cartridge exothermic chemical extraction.  Call today 913-286-2571 for a quote