High Performance Variable Air Volume Diffusers
(Even Temperature Even Comfort)

Acutherm, founded in 1978, designs, manufactures, and distributes a line of modular VAV systems and thermally powered VAV diffusers for use in HVAC systems. The company maintains its own research and development and manufacturing facilities in order to have total control over product lead time and quality. In 2017 Acutherm was acquired by Price Industries, Canada. With the acquisition by Price Industries, Acutherm and its unique range of Thermally powered VAVs in different configuration comes, backed up with Price Industries backing. Price Industries is one of the largest manufacturers of HVAC related products, with manufacturing facilities in USA & Canada. We are now proud to offer….

Products :

Square Therma-Fuser VAV Diffusers

24″ (600mm) square With neck sizes of 6” upto 12”
Series TF, ST for cooling and/or heating option

Round Therma-Fuser VAV Diffusers

STR Diffuser 
23 3/4″ (603mm) round, thermally powered, individual comfort control

Linear Therma-Fuser VAV Diffusers

TL Linear
TLC Continuous Look Linear
TLW Sidewall Linear

Linear slot, thermally powered, individual comfort control

Building Automation

Also available in BMS compatible intelligent series:

EF Interoperable Square Diffuser
EL Interoperable Linear Diffuser
ELW Interoperable Sidewall Linear Diffuser
E-PIM Static Pressure Control

Associated Products

Static Pressure Control:         Supply Air Temperature Control:
PIM / R-PIM                            SMC / AZON

Options and Accessories

Digital Wall Adjuster 
Provides occupant easy access to the set points in the diffuser

Bypass relief rings for static pressure control

Ceiling Approaches
Installation options for other than standard lay-in ceilings

Advantage Series

Motorised VAV Diffusers

Advantage Series VAV diffusers provide personal control within a zone by modulating the flow of supply air to a particular area. With the ability to monitor load and supply air temperature, the Advantage VAV diffuser is an exciting alternative to VAV terminal units. Native BACnet™ ensures that the Advantage will exchange data with products from other vendors on any BACnet™ MS/TP DDC building control network.

Advantage VAV diffusers are nominal 24” (600mm) square ceiling diffusers with built in DDC controller, temperature sensors and VAV damper. The motor-driven damper opens or closes to deliver air flow (hot or cold) into the room in response to room temperature and setpoint. An electric motor directly drives a threaded shaft connected to the damper. The electric motor has been tested to provide years of reliable service. 

The Advantage features PI (Proportional + Integral) control algorithms for proven control, stability, and versatility. Con¬tinual feedback of room temperature compared to room set point improves response over time by eliminating “hunt¬ing” and “thermal overshoot”, maximizing comfort in the space.

All Advantage Series models are provided with 6, 8, 10, 12 or 14” inlets for standard connection to supply ductwork. 

Reference Videos

Working of Therma-Fusers Smoke Testing

Acutherm Therma-Fuser VAV Diffuser – 
Model TF-HC Diffuser

Acutherm Therma-Fuser Diffuser –
Sustainable Design