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Horstmann Service Plus Central Heating Programmer

Boiler programmers and timers, Central heating programmers and timers, 24 Hour mechanical programmers and timers, 7-Day Digital programmers and timers


ServicePlus Electronic Programmers



A range of programmers and timeswitches developed to facilitate compliance with the Gas Safety (Installation and Use) Regulations 1998. Although not intended to replace the normal servicing regime, it can act as a supplementary aid to enabling compliance.

  • Inexpensive and easy to install
  • Simple to use
  • Facilitates compliance with Gas Safety Regulation 36
  • 28 Day Service Warning
  • Part L Compliant
  • 3 Amp rated
  • Single and two channel models with 24 hour and 7 day options
  • Three ON and OFF periods each day
  • Hot water boost and central heating advance
  • Mains powered with battery back-up
  • Programme options On 24hrs, OFF, All Day or Auto



Model   inc VAT

ServicePlus S27   45.74
ServicePlus S21   45.74
ServicePlus S17   47.29
ServicePlus S11   48.69


Available Literature: Brochure & Datasheet

Installation Instructions

(Available from Horstmann)

Operating Instructions

S11  S17  S21  S27



Single Channel

Two Channel
24 Hour
7 Day
ServicePlus S27  
ServicePlus S21  
ServicePlus S17
ServicePlus S11



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