The W-Series Heater incorporates a specially designed electric quartz heating element that produces safe infrared radiant energy. Radiant energy is only absorbed by solid objects and is not wasted heating the air. Since there are no open flames or carbon monoxide emissions, mounting clearance requirements are minimal. W-series fixtures can be installed at lower mounting heights, under canvas, wood awnings, eaves and in interior locations. Solid state and analog controls are available for intensity adjustment including multiple zones, timers and home system integration.