| Connection Type | Threaded |
| Materials (Body) | ASA Thermoplastic |
| Application | A control with remote temperature sensing and integral set point. Adjustable limits. |
| Used With | V2000, V100 |
| Dimensions | 3.07 H x 1.95 Dia. (not including remote) |
| Temperature Range (F) | 34 F to 82 F |
| Connection Size (in.) | M30 x 1.5 |
| Capillary Length (ft) | 6 ft. 7 in. |
| Capillary Length (m) | 2.0 m |
| Replaces | T100F1395 |
| Scale Markings | 0 - * - 1 … 5 |
| Collar Diameter (in.) | 1 3/16 in. |
| Sensor (Integral or Remote) | Remote |
| Setpoint (Integral or Remote) | Integral |
Description
The T301920W0 is a thermostatic radiator actuator from Resideo (Honeywell Home), part of the Thera-6 line. It is the head that sits on the radiator valve and holds the room at the temperature set on the dial, with no power and no wiring.
The mechanism is a sealed charge that expands as the room warms and pushes the valve closed. Because it is entirely mechanical, it keeps working through a power cut and it never needs a battery — which is why TRVs are still specified on hydronic systems that have every other control electronic.
This head uses a remote sensor. The sensing element sits on a capillary away from the valve, which matters when the valve is behind a cover, under a deep sill, or low to the floor — anywhere the air around the valve is not the air the room is actually at. A head sensing its own radiator reads hot and shuts the radiator down early.
Connection: M30x1.5, the common European thermostatic valve thread. It does not fit Danfoss RA bodies, which use their own connection.
What a working TRV takes: a valve body and a thermostatic head, ordered separately. This listing is the head.
Valve bodies this head is built for
- Resideo V2040ASL20 Horizontal Angle Pattern 3/4 in Radiator Valve
- Resideo V2040DSL15 Straight Pattern 1/2 in Thermostatic Radiator Valve
- Resideo V2040DSL20 Straight Pattern 3/4 in Thermostatic Radiator Valve
- Resideo V2040ESL15 Angle Pattern 1/2 in Vertical Thermostatic Radiator Valve
- Resideo V2040ESL20 Angle Pattern 3/4 in Vertical Thermostatic Radiator Valve
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: T301920W0
- Type: Thermostatic radiator actuator
- Product line: Thera-6
- Sensor: Remote
- Connection: M30x1.5
- UPC: 5059087010353
- Category: Thermostatic Radiator Controls