EF: Interoperable Square Therma-Fuser VAV Diffuser


Model EF Therma-Fuser VAV diffusers are 24in / 600mm square ceiling VAV diffusers with built-in DDC controller, temperature sensors and flow sensors providing VAV cooling and VAV heating. Four blade dampers move open and close to meter air flow (warm or cool) into the room in response to room temperature. The dampers are modulated by a brushless DC stepper motor. Room air is positively induced over the built-in temperature sensor or optionally sensed at the wall mounted Adjuster for an accurate measurement of room temperature in both cooling and heating.


  • Native BACnet™
  • Four blade dampers provide superior air distribution and quieter operation
  • Individual comfort over a wide range of control
  • 2 year warranty