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Buying Advice

How to Choose a Boiler Installer — 10 Things to Check

Not all boiler installers are equal. Here are the 10 most important things to check before booking.

26 July 2025·6 min read·By Corby Boiler Installations

How to Choose the Right Boiler Installer

  1. Gas Safe Registration: Non-negotiable. Check the engineer's Gas Safe ID before any work begins. Verify at GasSafeRegister.co.uk.
  2. Experience: Ask how long they've been installing boilers and which brands they're trained on.
  3. Reviews: Check Google, Checkatrade, or Which? Trusted Traders reviews. Look for consistent patterns, not just star ratings.
  4. Fixed Quotes: Reputable installers provide written fixed-price quotes. Be wary of verbal estimates that change on the day.
  5. Warranty Support: Will they handle warranty claims on your behalf? This is worth asking.
  6. Aftercare: Do they offer annual servicing? Having the original installer service the boiler is ideal.
  7. Insurance: Public liability insurance is essential. Ask for proof if in doubt.
  8. Accreditations: Worcester Bosch Accredited Installer, Vaillant Advanced Installer, etc. These mean engineers have received manufacturer training.
  9. Finance Options: If you need finance, check their options upfront.
  10. Communication: How quickly do they respond? A slow response before the job often means slow response to aftercare issues too.
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