Acutherm Therma-Fuser™ Diffuser (Model A-STHC)

Acutherm Therma-Fuser™ Diffuser (Model A-STHC)

Acutherm’s Therma-Fuser™ diffusers are ceiling diffusers with built in room thermostats and dampers for varying the air volume. The dampers are continuously adjusted by thermostat/actuators that are both room temperature sensors and damper motors.

Non electric thermostat/ actuators are brass cylinders containing a petroleum distillate wax that melts when heated and expands at precise temperatures, like those in the aerospace industry, positioning the damper in a proportional manner.

Thermostat/actuators open and close the dampers to vary the volume of air flow (warm or cold) into the room in response to room temperature. Room temperature is measured by inducing a sample of air from the room across the thermostat.

When supply air is warm, the Therma-Fuser diffuser operates in the heating mode and the dampers open on a drop in room temperature. When the supply air is cold, the diffuser operates in the cooling mode and the dampers open on a rise in room temperature.

Separate room temperature set points for heating and cooling are adjusted by aligning the indicators along °F or °C temperature scales.

Standard finish is powder coat white.

Model A-STHC

  • Face Size: 595 x 595 for lay-in T-Bar ceiling installations
  • Inlet Diameter: 150 / 200 / 250 / 300 mm
  • Pressure ranges: 12 to 62 Pa 
  • Air volumes: 50 to 350 l/s