Siemens
Siemens RAA21 Standard Room Thermostat
Siemens RAA21 standard room thermostat for regulating room temperature in domestic heating systems.
At a glance
- Also known as 4190020
£15.98
£13.32 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Siemens RAA21 is a standard room thermostat used to measure and control room temperature within a domestic heating system. It is a mains-powered room control unit that switches the heating demand according to the set point, and sits within the Siemens range of room thermostats.
Before you order
- Confirm the part number RAA21 matches the thermostat being replaced.
- Check the existing wiring arrangement and terminal layout before removal, so the replacement can be connected in the same configuration.
- Confirm the thermostat is suitable for the heating system and control voltage it is being fitted to.
Compliance
| Alternative numbers | 4190020 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIEMENS THERMOSTATS | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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