Boiler Efficiency Ratings 2025 | ECO4 Government Scheme

Compare boiler efficiency ratings to find out if a replacement boiler could save you money on your energy bills. Check SEDBUK and ErP ratings to make an informed decision about your heating system.

Top Manufacturers

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HRM Boilers

Quality boiler manufacturer with reliable heating solutions

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British Gas

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Dimplex

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ATAG

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Understanding Boiler Efficiency

Learn about the different efficiency rating systems and how they affect your energy bills

SEDBUK Ratings

SEDBUK (Seasonal Efficiency of a Domestic Boiler in the UK) provides a percentage rating showing how much energy is used vs. wasted when heating your home.

92%+ (A-rated)Excellent
85-91% (B-rated)Good
78-84% (C-rated)Average
Below 78% (D-G rated)Poor
ErP Directive

The Energy related Products (ErP) Directive requires all boilers to display an energy label from A+++ to G, with A+++ being the most efficient.

A+++ to AMost Efficient
B to CGood Efficiency
D to FAverage
GLeast Efficient

Why Boiler Efficiency Matters

Understanding boiler efficiency can help you make informed decisions about your heating system, potentially saving hundreds of pounds annually while reducing your environmental impact.

Lower Energy Bills

More efficient boilers use less fuel to produce the same amount of heat, reducing your monthly energy costs significantly.

Reduced Carbon Footprint

Efficient boilers produce fewer carbon emissions, helping you contribute to environmental protection and meet UK climate targets.

Better Home Comfort

Modern efficient boilers provide more consistent heating and better temperature control throughout your home.

Longer Lifespan

Efficient boilers are typically built with better components and technology, resulting in longer operational life.

Calculate Your Potential Savings

Use our free boiler efficiency calculator to estimate your annual savings and CO₂ reduction. See exactly how much you could save by upgrading to a more efficient boiler.

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Compare Boilers Side by Side

Compare different boiler models, efficiency ratings, and specifications to find the perfect boiler for your home. Make an informed decision with our comprehensive comparison tool.

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Ready to Upgrade Your Boiler?

Check if you're eligible for a free A-rated boiler through the ECO4 scheme and start saving money on your energy bills today.

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