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Boiler reviews

These boiler reviews are based on the experiences of thousands of real consumers that have been collected and analysed by Which? experts, so you can be confident in our recommendations.

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Glow-worm boiler reviews

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What is 'Brand score'?

The brand score is made up of brand reliability (assessed by customer survey), brand customer satisfaction (assessed by customer survey) and ratings from heating engineers (based on Which? Trusted Traders heating engineer survey). These surveys were carried out in May and June 2020. To learn more read how we assess boilers.

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