Square Therma-Fuser (TF)

The Acutherm TF is a 24″ square, thermally powered variable-air-volume diffuser with integrated thermostatic control. It automatically regulates airflow to maintain room temperature setpoints, providing quiet, energy-efficient comfort control for each zone — without electrical or pneumatic connections.

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Acutherm TF Square Therma-Fuser diffuser

Description

Product Model TF 24″ Square Options and Accessories Info:
  • Model: TF — Square Therma-Fuser diffuser
  • Types: TF-HC (heating & cooling), TF-HC-LH (limited heat), TF-CW (cooling with warm-up), TF-C (cooling only), TF-HC-NH (no heat), TF-D (manual), TF-RA (return air).
  • Inlet Sizes: 6″, 8″, 10″, and 12″ round
Features
  • Thermally powered actuator — no wiring or pneumatics required.
  • Separate heating and cooling thermostats with individual adjustable setpoints.
  • Changeover thermostat automatically switches between heating and cooling.
  • Micrometer-type temperature setpoint dials accessible under hinged appearance panel.
  • Provides proportional airflow control maintaining temperature within ±1.5°F of setpoint.
  • Ten-year manufacturer warranty.
Options
  • Remote Adjust: DA1 or DA1M Digital Wall Adjuster
  • Relief Ring: R6, R8, or R10 for pressure bypass
  • Insulation: I for attic-side insulation
  • Security Hanger: H
  • Minimum Flow Stops: FR (rubber type) or FS (screw type)
  • Sheared Housing: 595 mm option for metric ceiling grids
  • Blow Patterns: TFD3 (3-way), TFD2 (2-way), TFD2C (corner), or TFD1 (1-way)
  • Silk Screen: S patterned face
  • Sensor: SMCS or SENSOR for third-party integration
Accessories
  • Ceiling Frames: TFHD (hard ceiling), TFSP (spline), TFT1/TFT2 (T-bar), TFAL (air lifter/open ceiling)

TF diffusers include a manual balancing lever for field setup, adjustable minimum airflow stops, and accessible calibration through the appearance panel for maintenance-free operation.

Quick Specs

  • Face Size: 24″ (600 mm) square
  • Inlet Sizes: 6″, 8″, 10″, 12″
  • Setpoint Range: 70–78 °F (21–26 °C), factory 74 °F
  • Changeover (TF-HC/CW): 76–80 °F heating engagement, 68–72 °F cooling return
  • Static Pressure: 0.05–0.25 in. wg
  • Material: Steel construction, powder-coated appearance panel
  • Warranty: 10 Years

Downloads

Submittal (PDF) IOM (PDF)

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