EPH CP4B OpenTherm Battery Operated Programmable Thermostat

The EPH CP4B is a battery operated digital programmable room thermostat designed to control one heating zone. It supports OpenTherm, Optimum Start, TPI and On/Off control modes and is Boiler Plus compliant, making it suitable for both new installations and replacements in domestic properties.

The unit offers straightforward programming with a clear display and robust build quality backed by a five-year warranty. It provides precise temperature management from 5 to 35 °C with adjustable switching differential.

Key Features

• OpenTherm compatible
• Optimum Start and TPI control
• On/Off and OpenTherm modes
• Boiler Plus compliant
• Battery powered with 2 x AA batteries
• 5 year warranty
• IP20 rated
• Adjustable switching differential 0-1.0 °C
• SPDT switch output
• CE UK CA marked

Benefits

• Accurate single-zone heating control
• Energy efficient operation with Optimum Start
• Flexible control modes to suit different systems
• Reliable performance from a trusted manufacturer
• Long-term peace of mind with extended warranty
• Simple programming for everyday use

Technical Specifications

• MPN: CP4B
• Power Supply: 2 x AA Batteries
• Contact Rating: 8(3.5)A
• Switch Output: SPDT
• Temperature Range: 5…35 °C
• IP Rating: IP20
• Adjustable Switching Differential: 0…1.0 °C
• Warranty: 5 years

What’s in the Box?

1 x EPH CP4B OpenTherm Battery Operated Programmable Thermostat