Safety feature, monitors the quantity of air flowing through the heater, adjusts the heater’s capacity to match the air flow available and shuts the heater down in case of a total loss of air. This feature is available only on heaters equipped with full SCR.

The D21-PSSR electronic controller has been designed to be a compact solution to take full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements...

Electronic Sequencer The TH34 electronic sequencer has been designed as a compact solution to replace bimetallic mechanical sequencers to split loads into smaller delayed sequences. When the thermostat contact closes, Q1 is instantly activated and then Q2 to Q4 after approximate...