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    AI Overview

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    AI Overview
    Smart Room WiFi Boiler Controller Thermostat 7 Days ...
    A programmable OpenTherm thermostat modulates a compatible boiler’s output to match heating demand rather than just switching it on/off, maximizing efficiency and comfort. Key models include the EPH CP4i (app-enabled), Salus DT600, and Resideo T4M. These devices offer scheduling, 7-day programming, and TPI control, allowing for precise, energy-efficient temperature management. 
    Key Features and Benefits 
    • Modulation: Instead of running at full power until the target temperature is reached, the thermostat dictates the boiler's firing rate to maintain a steady temperature efficiently.
    • Compatibility: Designed for OpenTherm compatible combi-boilers and heating systems.
    • Energy Savings: The precise modulation reduces overheating and saves energy.
    • Programming Options: Most models offer 7-day or 5/2 day scheduling.
    • Smart Control: Some models like the EPH-CP4i provide Wi-Fi connectivity for app-based control.
    • Efficiency Standards: Many are Boiler Plus compliant. 
    Top Programmable OpenTherm Models 
    • EPH CP4i / CP4D (Wireless): Features a large LCD screen, 7-day programming, and app support for remote control.
    • Salus DT600 (Wired): Offers precise control with features like "Optimum Start" and a "Landlord PIN" function.
    • Resideo T4M (Wired): A modern, 7-day programmable thermostat designed for easy installation and compatibility with 24-230V OpenTherm appliances.
    • Google Nest Learning Thermostat 3rd Gen (Smart): A high-end option that supports OpenTherm protocol for modulation. 
    Installation Considerations 
    • Wiring: While many modern units are wireless, they still require connection to a receiver near the boiler.
    • OpenTherm Compatibility: It is essential to ensure the boiler is OpenTherm-certified to utilize modulation. 
    • EPH-CP4i OpenTherm Smart RF Wi-Fi Thermostat | Full ...
      Nov 1, 2025 — the month is June Jan March April May June 6 the date is the 24th. time is 242. 24 daylight saving is off done done done program n...
      YouTube·Plumbing Doctors
      9m
    • T4H310A3032 T4M Wired OpenTherm® thermostat - Resideo
      Product overview. The T4 programmable thermostat is a modern a wired 7-day Programmable Room Thermostat. It is designed to provide...
      Resideo
    • DT600 Wired programmable OpenTherm thermostat - Salus Controls
      OpenTherm communication enables a more precise control on the boiler or installation by adjusting the temperature to match the var...
      saluscontrols.com
    Show all
    Show more

    T3H310A0045 T3M Wired Opentherm® programmable ...


    Resideo
    https://www.resideo.com › programmable-thermostats
    Resideo
    https://www.resideo.com › programmable-thermostats
    The T3 Series of programmable thermostats provide sophisticated automatic control of domestic heating systems. They have been developed to provide intuitive ...Read more
    Programmable Opentherm Thermostat from www.resideo.com
    Free delivery over $50 · 30-day returns
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    CP4M - OpenTherm® Mains Operated Programmable ...


    EPH Controls
    https://www.ephcontrols.com › Product Sections
    EPH Controls
    https://www.ephcontrols.com › Product Sections
    This digital programmable room thermostat is suitable for controlling 1 heating zone. It features OpenTherm®, Optimum Start, TPI and On/Off control modes.Read more
    Programmable Opentherm Thermostat from www.ephcontrols.com

    EPH OpenTherm Programmable Cylinder Thermostat - HPW


    Heating Parts Warehouse
    https://heatingpartswarehouse.com › Uncategorised
    Heating Parts Warehouse
    https://heatingpartswarehouse.com › Uncategorised
    Digital RF programmable room thermostat and receiver suitable for controlling 1 heating zone. It features OpenTherm®,Optimum Start, TPI and On/Off control ...
    Programmable Opentherm Thermostat from heatingpartswarehouse.com
    €110.00 · In stock · 28-day returns
    People also ask
    What is an OpenTherm thermostat?
    OpenTherm is a language that compatible thermostats and heating systems can use to talk to each other, enabling thermostats to control heating and domestic hot water systems.

    OpenTherm and what Nest thermostats can do with it


    Google Help
    https://support.google.com › googlenest › answer
    Google Help
    https://support.google.com › googlenest › answer
    Is it worth using OpenTherm?
    OpenTherm is most certainly better than (modulated) on/off switching. It will both save money and be better for the equipment.Nov 17, 2025

    Help choosing boiler: Is OpenTherm overhyped?


    Home Assistant Community
    https://community.home-assistant.io › help-choosing-boil...
    Home Assistant Community
    https://community.home-assistant.io › help-choosing-boil...
    Is there a programmable thermostat?
    A programmable thermostat allows users to set automatic temperature schedules for different times of the day or week to best fit their daily routine. This type of thermostat adjusts the heating or cooling system based on user-defined settings to help optimize comfort and energy use.

    Programmable Thermostats - Flex Scheduling - Honeywell Home


    Honeywell Home
    https://www.honeywellhome.com › collections › progra...
    Honeywell Home
    https://www.honeywellhome.com › collections › progra...
    Does Drayton Wiser work with OpenTherm?
    What makes Wiser wiser? Take home heating and automation to the next level with our new range of Hubs and smart home products. Designed for UK heating systems and incorporating OpenTherm, Wiser 2nd Generation is the first step towards full home energy management.

    Wiser 2nd Generation for heating and smart home automation - Drayton


    Drayton
    https://www.draytoncontrols.co.uk › sites › default › files
    Drayton
    https://www.draytoncontrols.co.uk › sites › default › files
    Feedback

    WQ610 Wired programmable OpenTherm thermostat - Salus


    saluscontrols.com
    https://saluscontrols.com › Home › Shop
    saluscontrols.com
    https://saluscontrols.com › Home › Shop
    OpenTherm communication enables a more precise control on the boiler or installation by adjusting the temperature to match the varying demand from the ...Read more
    Programmable Opentherm Thermostat from saluscontrols.com

    What is Opentherm, whats makes a smart thermostat smart ...


    YouTube · Hydroheat
    33.3K+ views · 6 years ago
    YouTube · Hydroheat
    33.3K+ views · 6 years ago
    In this video I'm going to be going into a bit more detail about how these smart thermostats think differently and communicate differently with the boiler.
    11:54
    10 key moments10 key moments in this video
    From 00:00
    What is a smart thermostat?
    From 00:47
    How a traditional thermostat works
    From 02:38
    Modulating Controls
    From 04:26
    Benefits of TPI
    From 06:40
    What is Opentherm?
    From 07:12
    Which boilers have Opentherm?
    From 08:02
    What is TPI?
    From 09:23
    Weather Compensation
    From 10:30
    Frequently asked questions
    From 11:23
    Thanks for watching
    Missing: Programmable ‎| Show results with: Programmable
    Hydroheat
    YouTube·
    Feb 18, 2020

    What is Opentherm, whats makes a smart thermostat smart ...

    YouTube·Hydroheat ·Feb 18, 2020
    YouTube
    In this video
    • 00:00
      What is a smart thermostat?
    • 00:47
      How a traditional thermostat works
    • 02:38
      Modulating Controls
    • 04:26
      Benefits of TPI
    • 06:40
      What is Opentherm?
    • 07:12
      Which boilers have Opentherm?
    • 08:02
      What is TPI?
    • 09:23
      Weather Compensation
    • 10:30
      Frequently asked questions
    • 11:23
      Thanks for watching

    Salus Smart Controls RT520RF 7 Day Wireless ...


    eBay
    https://www.ebay.com › ... › Programmable Thermostats
    eBay
    https://www.ebay.com › ... › Programmable Thermostats
    OpenTherm communication (OT+ 4.0) gives you two-way communication between boiler and thermostat. Thermostat modulates boiler power to achieve maximum efficiency ...Read more
    Programmable Opentherm Thermostat from www.ebay.com
    $86.32 · In stock · 4.5(60) · $7.95 delivery

    EPH Controls CP4 OpenTherm® Programmable RF ...


    Tippers
    https://www.tippers.com › rf-thermostat-and-receiver
    Tippers
    https://www.tippers.com › rf-thermostat-and-receiver
    Digital RF programmable room thermostat and receiver suitable for controlling 1 heating zone. It features OpenTherm®, Optimum Start, TPI and On/Off control ...
    Programmable Opentherm Thermostat from www.tippers.com
    £65.08

    T4 Programmable Thermostat | Resideo EMEA


    Resideo
    https://www.resideo.com › solutions › home-comfort
    Resideo
    https://www.resideo.com › solutions › home-comfort
    T4 programmable thermostats are designed to work with on/off and OpenTherm® compatible heating and cooling appliances, such as boilers and district heating ...Read more
    Programmable Opentherm Thermostat from www.resideo.com

    Opentherm Z-wave thermostat : r/homeautomation


    Reddit · r/homeautomation
    4 years ago
    Reddit · r/homeautomation
    4 years ago
    I'm looking for an OpenTherm thermostat, that is also able to communicate with my Fibaro HC2 through Z-wave. We have zoned floor heating in our ...Read more

    Programmable Opentherm Thermostat


    etopcontrols.com
    https://www.etopcontrols.com › programmable-openthe...
    etopcontrols.com
    https://www.etopcontrols.com › programmable-openthe...
    This energy saving digital UFH thermostat is battery powered climate controller. The design boasts a large LCD for an elegant and modern look. Opentherm ...
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