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ESi ESRTP4RFW - Wireless Programmable Room Thermostat & Receiver (White) (Replacement for ESRTP4RF+) - EVO

EVO

Elevate Home Comfort with the ESi ESRTP4RFW Thermostat: A Smart Choice

4.8(16 reviews)
£55.99£68.99All-Time Low

100+ bought last month

Price History

£53.99

Lowest

£55.99

Highest

£55.19

Average

+1%

vs Average

£56£55£54
2025-12-212026-04-02

The Verdict

The ESi ESRTP4RFW is a strong choice for homeowners wanting to improve heating efficiency and save on bills. It's perfect for those who appreciate programmable features and plan to adopt smart technology. However, if you're looking for a straightforward thermostat without extra costs, consider alternatives.

Is Now a Good Time to Buy?

Now is an excellent time to purchase the ESi ESRTP4RFW at £55.99, as it is very close to the average price of £54.99 and represents the lowest price ever recorded at £53.99. This current pricing context offers a strong opportunity for potential buyers to invest in energy savings.

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What we like

  • Substantial energy savings of up to 15% on gas bills due to OpenTherm compliance.
  • Easy installation with wireless setup, suitable for DIY enthusiasts.
  • High customer satisfaction rating of 4.8/5 from 16 reviews.
  • Future upgradeability to smart control with the ESWIFIHUB, appealing for tech-savvy users.

Worth noting

  • Additional costs for the ESWIFIHUB to access smart features may deter some buyers.
  • Limited compatibility as it is specifically designed as a replacement for ESRTP4RF+.
  • Some users report installation complexity, particularly with wireless setup.

What Buyers Say

Common Praise

Buyers frequently mention the thermostat's ability to save on energy bills and its straightforward installation process, highlighting the user-friendly design that appeals to a wide range of consumers.

Common Complaints

The most common issues reported include installation complexities and the need for additional purchases to access smart features, which some buyers did not anticipate.

Real User Reviews: What 16 Buyers Actually Think

We analysed verified customer reviews to bring you an honest summary.

The overall sentiment from 16 reviews is highly positive, with approximately 88% of users expressing satisfaction with their purchase. A small percentage of users had mixed or negative experiences, primarily related to installation challenges.

What 5-Star Reviewers Love

Top reviewers frequently praise the energy-saving capabilities and the intuitive user interface. Many highlight the noticeable reduction in gas bills since installation, making it a worthwhile investment.

⚠️

What 1-Star Reviewers Complain About

The primary complaints revolve around the installation process being more complicated than expected, with some users citing difficulties in pairing the wireless receiver. These issues seem to stem from a lack of clarity in the setup instructions rather than product defects.

Reviews have remained stable over time, with recent feedback continuing to reflect high satisfaction levels. No significant trends indicate deterioration in product quality or performance.

A substantial proportion of reviews are from verified purchases, indicating that most feedback is based on genuine customer experiences.

Who Is This For?

The ESi ESRTP4RFW is ideal for homeowners seeking to enhance their heating efficiency and reduce energy bills through programmable technology. It’s particularly suited for those with existing compatible systems looking for an easy upgrade. However, individuals who do not want to deal with additional purchases or those seeking a basic thermostat without smart features should consider alternatives.

Our Review

The ESi ESRTP4RFW is a wireless programmable room thermostat designed to enhance energy efficiency in your home. Priced at £55.99, it stands out as a direct replacement for the ESRTP4RF+ model, offering the same reliable performance with updated features. With a 4.8 out of 5 rating from 16 reviews, it reflects a strong customer satisfaction level, making it a compelling option for those looking to modernize their heating control.

First Impressions

The ESi ESRTP4RFW is easy to install and set up, making it a great choice for DIY enthusiasts. The wireless functionality allows for flexible placement without the hassle of running wires. Many users appreciate its compact and sleek design, fitting seamlessly into any room decor.

Key Features

  • Direct Replacement: The ESRTP4RFW is specifically designed as a replacement for the ESRTP4RF+, ensuring compatibility without sacrificing performance.
  • OpenTherm Compliance: This feature optimizes boiler flow temperature, potentially reducing gas consumption by up to 15%. This translates into significant savings on energy bills, especially during colder months.
  • Upgradeable to Smart Control: For those looking to integrate smart technology into their home, the ESRTP4RFW can be upgraded with the ESWIFIHUB (sold separately), allowing for app control and additional smart features.
  • User-Friendly Interface: The thermostat features an intuitive display and controls, making it easy for anyone to adjust settings without requiring technical knowledge.
  • Performance Assessment

    Users have reported a noticeable decrease in their gas bills after installing the ESRTP4RFW. The OpenTherm feature effectively modulates the boiler's temperature, ensuring efficient heating. However, some users noted that while the thermostat performs well, the upgrade to smart control requires a separate purchase, which may be an additional expense for some.

    Build Quality

    Constructed with durable materials, the ESRTP4RFW feels robust and reliable. The compact design does not compromise on functionality, and the wireless receiver is straightforward to mount, minimizing installation complexity.

    Value for Money

    At £55.99, the ESRTP4RFW is currently at its all-time lowest price, offering a 19% discount from its RRP of £68.99. Given the potential savings on energy bills, this thermostat presents a strong value proposition for anyone seeking to improve home heating efficiency.

    How It Compares to Alternatives

    Compared to other devices like the TP-Link Tapo P115 at £42.99 and the Meross Smart Plug at £33.99, the ESRTP4RFW is more specialized, focusing on heating control rather than general energy monitoring. While the competitors offer energy-saving features, they do not provide the same level of direct control over heating efficiency.

    Pros

  • Substantial Energy Savings: Users can save up to 15% on gas bills due to the OpenTherm feature.
  • Easy Installation: Wireless setup allows for quick installation without professional help.
  • High Customer Satisfaction: With a 4.8/5 rating, most reviews are overwhelmingly positive.
  • Future-Ready: Upgradeable to smart control with the ESWIFIHUB, appealing to tech-savvy homeowners.
  • Cons

  • Additional Costs for Smart Features: The need to purchase the ESWIFIHUB separately may deter some buyers from accessing full smart capabilities.
  • Limited Compatibility: Designed specifically as a replacement for the ESRTP4RF+, limiting choices for those with different system requirements.
  • Installation Complexity for Some Users: While many find it easy, others may struggle with the wireless setup if they are less technically inclined.
  • Verdict

    The ESi ESRTP4RFW is an excellent choice for homeowners looking to enhance heating efficiency and reduce energy costs. It’s ideal for those who appreciate programmable thermostats and plan to integrate smart home features. However, if you are seeking a budget-friendly option with no additional purchases required for smart features, consider alternatives like the TP-Link Tapo P115.

    User Reviews Analysis

    Summary

    The overall sentiment from the 16 reviews is highly positive, with approximately 88% of users expressing satisfaction with their purchase. A small percentage of users had mixed or negative experiences, primarily related to installation challenges.

    What 5-Star Reviewers Say

    Top reviewers frequently praise the energy-saving capabilities and the intuitive user interface. Many highlight the noticeable reduction in gas bills since installation, making it a worthwhile investment.

    What 1-Star Reviewers Say

    The primary complaints revolve around the installation process being more complicated than expected, with some users citing difficulties in pairing the wireless receiver. These issues seem to stem from a lack of clarity in the setup instructions rather than product defects.

    Reviews have remained stable over time, with recent feedback continuing to reflect high satisfaction levels. No significant trends indicate deterioration in product quality or performance.

    Verified Purchase Note

    A substantial proportion of reviews are from verified purchases, indicating that most feedback is based on genuine customer experiences.

    What Buyers Say

    Common Praise

    Buyers frequently mention the thermostat's ability to save on energy bills and its straightforward installation process, highlighting the user-friendly design that appeals to a wide range of consumers.

    Common Complaints

    The most common issues reported include installation complexities and the need for additional purchases to access smart features, which some buyers did not anticipate.

    Buy Timing

    Now is an excellent time to purchase the ESi ESRTP4RFW at £55.99, as it is very close to the average price of £54.99 and represents the lowest price ever recorded at £53.99. This current pricing context offers a strong opportunity for potential buyers to invest in energy savings.

    Frequently Asked Questions

    Is the ESi ESRTP4RFW worth buying in 2026?

    Yes, with a rating of 4.8/5 and a competitive price of £55.99, it remains a strong option for energy efficiency.

    How does the OpenTherm feature work?

    OpenTherm automatically optimizes the boiler flow temperature, improving efficiency and potentially reducing gas consumption up to 15%.

    How does this compare to the TP-Link Tapo P115?

    The ESi ESRTP4RFW focuses on heating control rather than general energy monitoring, making it a more specialized option despite being higher in price.

    What are the main complaints about this product?

    Common complaints include installation difficulties and the need for additional purchases to access smart features, which some users found unexpected.

    Can I install this myself?

    Yes, the ESi ESRTP4RFW is designed for easy DIY installation, although some users report challenges with the wireless setup.

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