The ThermJet burner line has been extended with the addition of the ThermJet PCA burner for preheated combustion air operation. It accepts preheated air in the temperature range of 1,000F (540C) to achieve fuel savings of up to 50%. This nozzle-mixing burner offers high operating velocity and delivers precise temperature uniformity in an intense stream of hot gas, with velocities from 250 to 750 fps. The burner can be operated with any firing methodology, including on/off, pulse, time proportional, modulating and high/low. It is available in fourteen sizes up to 20MM Btu/h and can be fired on natural gas, butane and propane.