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    EPH CP4B – OpenTherm® Battery Operated Programmable Thermostat
    EPH CP4B – OpenTherm® Battery Operated Programmable Thermostat EPH CP4B – OpenTherm® Battery Operated Programmable Thermostat

    EPH Controls CP4B OpenTherm Battery Operated Programmable Thermostat

    Manufacturer: EPH Heating Controls, Thermostats & Programmers
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    The EPH Controls CP4B is a battery-operated digital programmable room thermostat designed to control a single heating zone. Featuring OpenTherm technology alongside Optimum Start, TPI and On/Off control modes, it provides flexible heating control for compatible boiler systems.

    With programmable temperature settings and a clear digital interface, the CP4B allows heating to be adjusted to suit your daily routine. Its battery-powered design uses two AA batteries, while the adjustable switching differential lets the thermostat be configured to suit the heating system.

    The EPH CP4B is Boiler Plus compliant and supports OpenTherm communication when connected to a compatible OpenTherm boiler.
    SKU: CP4B
    Availability: 15 in stock
    £51.41 incl tax
    i h

    Key Features



    • Manufacturer: EPH Controls

    • Model: CP4B

    • Product type: Battery-operated programmable room thermostat

    • Heating zones: 1

    • Control modes: OpenTherm, Optimum Start, TPI and On/Off

    • Power supply: 2 × AA batteries

    • Temperature range: 5°C to 35°C

    • Adjustable switching differential: 0°C to 1.0°C

    • Contact rating: 8(3.5)A

    • Switch output: SPDT

    • IP rating: IP20

    • Compliance: Boiler Plus compliant

    • Warranty: 5 years, subject to the manufacturer's terms and conditions


    Compatibility note: OpenTherm operation requires a compatible boiler and correct installation. Check your boiler's control requirements before purchasing.

    Products specifications
    Product Type Programmer
    Manufacturer EPH Controls
    Channel Single
    Programme Options 24hr
    Programme Options 7 day
    Programme Options 5/2 day mode
    Warranty 5 Years
    Product Type Thermostat
    Range CP4
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