Horstmann / Products / Heating and hot water controls / Programmable thermostats / ThermoPlus

Heating and hot water controls

Programmable thermostats



The Horstmann family of ThermoPlus programmable room thermostats set a new standard in their ease and simplicity of use. 

The ‘stats - which are suited to both new build installations or replacement of older style electro-mechanical thermostats - will find a range of applications in areas such as local authority housing, housing associations and social housing. 

The ThermoPlus is designed for ease of use, offering the user a clear display, colour coded warm or cool indicator and large buttons for make simple adjustments.

  • Applications
  • Features and Benefits
  • ThermoPlus can be used with most types of heating system where a simple user interface is beneficial, such as for the elderly and vulnerable.

    • Control of most domestic gas or oil-powered central heating systems
    • Control of additional heating zones
    • Combination ('combi') boilers
    • Control of solid-fuel heating systems
    • Replacement of existing thermostats
    • 5 pre-installed profiles
      • The installer can easily select the preferred programme most suitable for the householder 
    • Features colour coded, bright LED warm / cool display and Braille markings on the main override buttons
      • Unique user interface designed for simplicity and ease of use
      • Audible feedback from each button press 
    • Automatic GMT / BST time change
      • No need to adjust clock for summer and winter time changes 
    • Frost protection
      • Standby setting maintains frost protection at a minimum of 5C

    ThermoPlus AS2-RF
    This product is no longer available.

    ThermoPlus AS1
    Mains powered thermostat that does not need any batteries

    • Factory pre-set heating profiles and pre-set clock with battery back up
    • Audible and tactile feedback 

    ThermoPlus AS2

    Battery-operated thermostat that can easily replace an existing thermostat

    • Three standard AA batteries with at least a 2-year battery life
    • Separate clock power back up 

    ThermoPlus PRT1
    Specially designed for vulnerable and older users.

    • Mains powered
    • Features 15°C cool setting to provide hypothermia protection



    Mains Powered

    Battery Powered


    LED Display

    Fixed Hypothermia Setting

    ThermoPlus AS1



    ThermoPlus AS2



    ThermoPlus PRT1