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.

Built for trade and DIY use, 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