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Thera-20 (Projecthead Series) Radiator thermostat

Thera-20 (Projecthead Series) Radiator thermostat

A Radiator Thermostat is installed onto a Thermostatic Radiator Valve Body (TRV body)...

Product Description

A Radiator Thermostat is installed onto a Thermostatic Radiator Valve Body (TRV body).

The combination of both, the Thermostatic Radiator Valve (TRV), controls the room temperature by adjusting the flow of hot water through a radiator. TRVs are installed in water-based heating systems on the supply or, less commonly on the return connection of radiators. Radiator thermostats of this type with liquid sensor fulfill the European Standard EN 215 when used with certified Honeywell Home TRV bodies. Honeywell Home radiator thermostats with Honeywell Home (HW) M30 x 1.5 connection are suitable for all TRV body and radiator inserts with M30 x 1.5 connection and 11.5 mm closing dimension. Radiator Thermostats of this type with snapring (DA) type connection are suitable for TRV bodies and valve inserts with Danfoss (RA) type compatible snap connection.

Technical Properties

  • Conforms with M30 x 1.5 connection to European standard EN 215
  • With internal liquid-filled sensing element
  • Equipped with easy to use range stoppers
  • Modern ergonomical design
Sensing element internal
Temperature element liquid-filled
Closing dimension 11,5 mm
Setpoint limiting Yes
Cover cap Honeywell
Colour white

Certifications and Awards


Product Type EN215 certified
Body-head connection
Temp. setpoint range
Thera-2 with internal sensing element

M30 x 1,5 6 ... 28 oC -

M30 x 1,5 1 ... 26 oC

- RA-type 6 ... 28 oC -

- RA-type 1 ... 26 oC

Accessories and replacement parts


Image Description Product Type Downloads
Decoring for connection nut, white (RAL9016); 10 pair, 20 pieces TA1000A001  
Decoring for connection nut, Chrome; 10 pair, 20 pieces TA1000A002  
HZ-Adapter from M28 x 1.5 with 9.5 mm closing dimension to M30 x 1.5 with 11.5 mm closing dimension TA1010HZ01  
DA-Adapter from Danfoss snap connection RA to M30 x 1.5 TA1010DA01  
Theft-protection ring, white (RAL9016) TA6900A001