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Sustainable HVAC Solutions

Green Buildings Review of Therma-Fuser VAV Diffuser

Read what green-buildings.com has to say about LEED and the Therma-fuserTherma-Fuser VAV Diffuser Product Review

Therma-Fuser diffuser is a fully integrated, independent zone VAV control system including thermostat, modulating damper and diffuser in a single package. Unlike conventional building controls, Therma-Fuser diffusers require no wiring and operate automatically and independently. Therma-Fuser diffusers require little or no maintenance. Therma-Fuser diffusion dampers operate by opening and closing automatically to regulate air flow into the room in response to room temperature.

The dampers are mechanically actuated by thermal element thermostats. Each thermal element thermostat is a small brass cylinder containing petroleum-based wax. The wax expands when heated, driving a piston out. A spring retracts the piston when the wax cools and retracts. The movement of the piston either opens or closes the air dampers in a proportional manner.

Average room temperature is monitored by inducing a sample of air from the center of the room across the thermal element thermostats. Because this air sample is drawn directly from the air circulation pattern in the room, just before it mixes with air flowing into the room, it better represents average room temperature than air at a wall thermostat.

With Therma-Fuser diffusers, room temperature throughout the room can be held within 1 1/2º F of the temperature selected. Temperature of the room is selected between 70º and 78º F by adjusting the thermal element thermostat.

Article available at www.green-buildings.com.

For additional information on the Therma-Fuser VAV Diffuser visit www.ecohvac.com.au.