Round Therma-Fuser (STR)
The Acutherm STR is a 24″ round Therma-Fuser® VAV diffuser with a built-in thermostat and thermally powered actuator. It automatically modulates airflow based on room temperature, delivering individual zone comfort and energy savings without any electrical or pneumatic connections at the diffuser.
Description
Product Model STR 24″ Round Options and Accessories Info:
- Model: STR — Round Therma-Fuser diffuser
- Types: STR-C (cooling only) and STR-HC (heating & cooling with automatic changeover)
- Inlet Sizes: 6″, 8″, 10″, and 12″ round
Options
- Remote Adjust: Digital wall adjuster or wireless wall adjuster for local setpoint trim
- Security Hanger: H option for secure suspension
- 595 mm Metric Ring: 595 option for 600 mm ceiling grids
- Silk Screen Panel: S option for decorative face pattern
- Sensor Option: Sensor output for connection to monitoring / control systems
Accessories
- AC-STRAL: Air Lifter / anti-smudge ring for exposed or open ceilings
- AC-STRS: Round-to-square frame for 24″ × 24″ ceiling grid installations
STR diffusers include a balancing lever for manual full-open during air balance and a dial-set minimum-flow stop to maintain desired minimum airflow.
Quick Specs
| Face Size | 24″ round plaque diffuser |
| Inlet Sizes | 6″, 8″, 10″, 12″ |
| Actuation | Thermally powered wax motor |
| Setpoint Range | 70–78 °F (factory 74 °F) |
| Static Pressure | 0.05–0.25 in. wg |
| Warranty | 10 Years |
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