Siemens Thermostats & Controls

HydroHeat stock a range of specialised thermostats and controls from Siemens, offering a wide array of control options.


RAA31 Manual On/Off Room Thermostat
Thermostat with On/Off switch for heating only or cooling only. Setpoint adjustment with knob.


RAK-TR.1000B 15-95°C Thermostat
Temperature controller 15-95 °C, protection pocket 100 mm, capillary 700 mm, clamp on band.External scale, 1 changeover contact, immersion and strap-on thermostat in one.


RDE100-1RFS Wireless Room Thermostat
Battery-powered DC 3V thermostat with mains-powered AC 230 V receiver, with time switch, optional external input


MVI421-25 1″ 2-Way Zone Valve and
MXI421-25 1″ 3-Way Zone Valve

ANSI Class 125, Electronic Spring Return or Non-Spring Return Actuators, Normally Open or Normally Closed Brass Trim, NPT and Sweat Connections, New higher close-offs

SFA21 240V Electromotoric actuators
Electromotoric actuator for on/off control of zone. For on/off control of terminal units and heating zones. The actuators are equipped with a manual lever, spring return facility (NO valve closed) and 1.8 m connecting cable. 1 auxiliary switch is available as an accessory item.

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