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EPH CP4D – OpenTherm Programmable RF Thermostat
Regular price
£77.00
Inc. VAT
£64.17
Exc. VAT
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The EPH CP4D RF Programmable Dial Thermostat is a wireless OpenTherm programmable room thermostat with intuitive dial control, paired with an RF receiver for single-zone boiler control. It combines a large backlit display and handwheel temperature adjustment with Boiler Plus compliant load-compensating control, helping improve comfort and efficiency.
Why Buy the EPH CP4D RF Thermostat?
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Intuitive handwheel dial for quick, precise temperature changes with a clear digital display.
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OpenTherm modulation and TPI control to reduce boiler cycling and optimise efficiency.
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Fully programmable RF thermostat with multiple time and temperature periods each day.
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Boiler Plus compliant control strategy meeting current efficiency regulations.
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Frost protection, boost and holiday modes for all-season protection and convenience.
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Pre‑paired thermostat and receiver for straightforward wireless installation.
Suitable For
- Combi and system boilers needing an OpenTherm‑capable wireless programmable stat.
- Users who prefer dial-based temperature control with modern programmable features.
- Retrofit upgrades from basic on/off stats to Boiler Plus compliant RF controls.
- Homes aiming to improve efficiency and comfort with time/temperature zoning on a main circuit.
Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Wireless programmable dial room thermostat with RF receiver |
| Control Range | Approx. 5–35°C adjustable setpoint |
| Control Modes | Automatic, manual, off, holiday, boost with TPI and OpenTherm options. |
| Programming | Multiple daily time/temperature periods with 24‑hour, 5/2‑day or 7‑day modes. |
| Frost Protection | Adjustable frost setting active in off and holiday modes. |
| Thermostat Power | Battery powered with AA alkaline cells, low‑battery indication. |
| Receiver Power | Mains‑powered RF receiver for boiler switching. |
| Output Contacts | Volt‑free contacts suitable for most boilers and OpenTherm terminals. |
| Display | Large backlit LCD showing setpoint, room temperature and status. |
| Installation | Wall‑mounted thermostat and receiver, portable use possible with stand where supplied. |
| Typical Warranty | Extended multi‑year manufacturer warranty (check pack for exact duration). |
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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