EPH CP4M OpenTherm Mains Operated Programmable Room Thermostat

The EPH CP4M is a digital programmable room thermostat designed to control one heating zone with OpenTherm compatibility. Mounted on a standard 6-pin backplate, it offers flexible installation for new builds or replacements in UK homes.

Suitable for both trade and competent DIY installers, this mains-operated unit ensures reliable performance with multiple control modes including Optimum Start and TPI. Its robust build quality meets CE, UKCA and Boiler Plus standards.

Key Features

• OpenTherm, Optimum Start, TPI and On/Off control modes
• Boiler Plus compliant
• 6-pin industry standard backplate
• 5 year warranty
• CE and UKCA marked
• Digital programmable operation
• Adjustable switching differential
• SPDT volt-free switch output

Benefits

• Precise single-zone heating control
• Energy-efficient operation with OpenTherm
• Easy retrofit on standard backplate
• Long-term reliability with 5-year warranty
• Flexible control modes for comfort and efficiency
• Simple installation for professionals

Technical Specifications

• MPN: CP4M
• Power Supply: 230Vac 50Hz
• Contact Rating: 230Vac 7A
• Switch Output: SPDT Volt Free
• Temperature Range: 5…35°C
• IP Rating: IP20
• Switching Differential: 0…1.0°C

What’s in the Box?

1 x EPH CP4M OpenTherm Mains Operated Programmable Room Thermostat