Viconics’ R810 power switches have been designed for safe and reliable control of electric heat loads. This broad line of value priced products is used by most major North American duct heater manufacturers. The appropriate PWM or pulsed input signal can be provided by a DDC panel or Viconics’ own C1015 or C1025 thermostat. For a.c. fired inputs, a C24 interface board can be used.