Using the same concepts as the two smaller heaters, this heater wattage ranges from a three element 6,000 Watt unit to a six element 12,000 Watt unit. The blower motors are brush less and maintenance free. The heater can be controlled by the Thermostat Controller or the DS-4 Moisture/Temperature sensor. The Rack mounted DP-7SS Remote Monitor/Control Panel can be added to the DS-4. This heater required a professionally installed electrical service.