Horstmann 425D Diadem Two Channel Central Heating Programmer

(372 customer reviews)

£47.95 Ex VAT

Out of stock


Horstmann 425D Diadem Two Channel Central Heating Programmer

With rotating 24 hour dial, on and off tappets and slider switches for setting the programme, the 425 series are considered to be one of the simplest programmers to use and understand particularly where householders are used to and prefer a mechanical device.

Suitable for most types of wet domestic central heating.

  • Simple to use with easily understood settings
  • Easy to install, uses a 9 pin standard backplate
  • Backward compatible with all previous 425 ranges 
  • Voltage free contacts
  • Twin Circuit
  • Permanent on/off
  • On all day
  • On / off twice a day
  • 6 amp rated contacts

372 reviews for Horstmann 425D Diadem Two Channel Central Heating Programmer

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