which gas heaters offer the best energy efficiency ratings

As energy costs continue to rise, finding a gas heater that not only warms your home effectively but also boasts excellent energy efficiency ratings is essential. In 2026, several models stand out in terms of energy savings, performance, and overall value. This guide will explore some of the top gas heaters available, highlighting their efficiency ratings and features that make them worthy contenders for your home heating needs.

Understanding Energy Efficiency Ratings

Energy efficiency ratings are crucial when selecting a gas heater. These ratings indicate how well a heater converts fuel into usable heat, with higher ratings indicating better efficiency. The most common ratings used in the UK include the Energy Efficiency Index and the Seasonal Efficiency of Domestic Boilers in the UK (SEDBUK). A heater with a rating of A or above is typically considered very efficient.

Top Gas Heaters for Energy Efficiency in 2026

When evaluating gas heaters, certain models emerge as frontrunners in energy efficiency. Here are some of the best options currently available:

1. Worcester Bosch Greenstar i

The Worcester Bosch Greenstar i boasts an impressive energy efficiency rating of 94 per cent. This compact combi boiler is ideal for small to medium-sized homes and offers features such as a user-friendly interface and quiet operation. With the option for solar compatibility, this model is a great choice for eco-conscious homeowners looking to reduce their carbon footprint.

2. Vaillant ecoTEC Plus

Another excellent option is the Vaillant ecoTEC Plus, which achieves an efficiency rating of up to 94 per cent. This boiler is known for its reliability and performance, featuring an intelligent heating system that adjusts to your home’s requirements. With a stainless steel heat exchanger, the ecoTEC Plus also ensures longevity and reduced maintenance costs.

3. Ideal Logic+ Combi Boiler

With a rating of 94 per cent, the Ideal Logic+ Combi Boiler is a popular choice among homeowners. Its compact design allows installation in small spaces, and it features a simple control panel that makes operation straightforward. Additionally, the Logic+ comes with a seven-year warranty, providing peace of mind for long-term investment.

4. Baxi 800 Platinum Combi

The Baxi 800 Platinum Combi is another strong contender, offering an efficiency rating of 92 per cent. This model is particularly known for its easy installation and maintenance, making it a favourite among installers. Its compact size ensures that it fits well in various home settings, and it includes an impressive warranty period of up to 10 years.

5. Vokèra Easi-Heat Plus

The Vokèra Easi-Heat Plus is an affordable gas heater option with an impressive efficiency rating of 90 per cent. It is designed for ease of use and features a standard flue system, making it a flexible option for many homes. This model is particularly suitable for those on a budget, offering reliable heating without compromising on efficiency.

Practical Advice for Choosing a Gas Heater

When selecting a gas heater, consider factors beyond just the energy efficiency rating. Assess your home's size, the heating requirements, and the type of gas supply available. Additionally, consider the noise level of the heater and any features that may enhance convenience, such as programmable timers and smart controls. Lastly, ensure that you consult a qualified heating engineer to determine the best sizing for your home, as an incorrectly sized heater can lead to inefficiencies and increased energy costs.