Thera-4 Design is a thermostat from Honeywell's Thera-4 series that can be used with other Honeywell TRV bodies and radiator inserts. This thermostat has a M30 x 1.5 connection, conforms to European standard EN215, and comes with a liquid sensing element and a modern design.
The Thera-4 Design thermostat from Honeywell’s T2000 Series is a compact radiator thermostat that fits on standard TRV bodies. It uses a liquid‑filled sensing element and is available with either an M30 × 1.5 thread or a Danfoss snap connection.
The document lists key features such as EN215 compliance, a modern compact design, and easy‑to‑clean components. It includes dimensional drawings, accessory lists, ordering codes, and performance data (set‑point range, temperature limits, hysteresis, and response time) to help installers select the correct part and configure heating systems.
| Thermostat connection | M30 × 1.5 thread or Danfoss snap |
|---|---|
| Setpoint range (zero‑position) | 0 – 1.5 |
| Temperature range (zero‑position) | 1 – 28 °C (34 – 82 °F) |
| Closing dimension | 11.5 mm |
| Hysteresis | < 0.3 K |
| Response time | 30 min (max 40 min) |
The thermostat is offered with an M30 × 1.5 threaded connection or a Danfoss snap connection.
With the zero‑position (‘0’) the set‑point can be adjusted from 0 °C to 1.5 °C.
The thermostat operates from 1 °C to 28 °C (34 °F to 82 °F) when the zero‑position is selected.
The closing dimension is 11.5 mm.