Mount the Infratech 30-4034 3 zone remote control into a convenient wall near the heater and connect it to the main control box with low voltage wiring. Only one twisted pair of wiring is needed for each remote controlled zone. Any 120V source and only 1 amp of power is all that is needed to power the control.
The Infratech 30-4034 allows for the adjustment of the radiant energy intensity from 0-100% of power. The controls are for indoor or outdoor use, but be sure to install them in a covered area or cabinet if outdoors. They are not weatherproof.