Interoperable Square Therma-Fuser (EF)

• Model: EF — Square Interoperable Therma-Fuser diffuser
• Protocol: Native BACnet™ MS/TP, BTL® Tested and Listed to ANSI/ASHRAE Standard 135
• Actuator: Electric stepper motor, direct-drive (no gearbox)
• Inlet Sizes: 6″, 8″, 10″, and 12″ round

• Full interoperability — communicates seamlessly with third-party BAS networks via BACnet™.
• Self-contained diffuser with built-in controller, temperature sensors, flow sensors, and actuators.
• “Expert system” control logic — eliminates PID tuning, adapts automatically to room conditions.
• Continuous room air sampling via Venturi nozzles for accurate temperature sensing.
• Provides BAS outputs for room temperature, supply temperature, and air volume.
• Setpoints and modes configurable remotely via BACnet™ network.
• Accurate heated thermistor flow sensors on all four sides ensure balanced flow measurement.
• 10 VA 24 VAC power, BACnet three-wire daisy-chain network connection.

• Cooling: Dampers open on a rise in room temperature; proportional control maintains comfort.
• Heating: Dampers close on a rise in temperature; automatically selected based on supply vs. room temperature.
• Auto Mode Detection: Heating/cooling determined by comparing supply, room, and setpoint temperatures.
• Occupancy Modes: Occupied, Unoccupied, and Standby with separate setpoints.

• Room, supply, and flow measurements (real-time via BAS)
• Independent cooling and heating setpoints per occupancy mode
• Offsets for temporary vacancy (e.g., lunch breaks)
• Adjustable flow limits — minimum, maximum, standby, and heating-only flow
• Overrides for all sensors and damper positions (open/closed/flow)

• Frames: SPF (hard ceiling), 17 (tegular 9/16″ T-bar), 19 (tegular 1″ T-bar)
• Options: AFI (insulation), HB (security hanger), 600 (metric 600 mm housing), 1W/2W/2C/3W blow patterns

EF diffusers are shipped open for balancing and feature four dampers providing 66 linear inches of discharge for superior Coanda effect and uniform room mixing.