Siemens RWB29Si Twin Channel Programmer replaces the Siemens RWB29. This programmer is part of the Siemens range and is designed to allow you to control how your heating system operates. It is a reliable product which could help cut the cost of your energy bill significantly.
It makes use of a twin channel programme which allows you to setup when your heating turns on. Through the product you can control your heating system up to a week in advance.
Direct replacement (matching backplate & wiring) for:
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