A boiler installation involves gas work, Building Regulations, and significant cost. Getting it right matters. Here's how to identify a trustworthy installer before you commit.
Check Gas Safe registration first
This is non-negotiable. Any engineer working on gas must be Gas Safe registered. Verify at gassaferegister.co.uk — enter the licence number and check the engineer is qualified for domestic gas work. Never accept verbal assurances; always check.
Look for manufacturer accreditation
Worcester Bosch Accredited Installer, Vaillant Advance Partner, and similar accreditations mean the engineer has passed manufacturer training. This often unlocks extended warranties and indicates technical commitment.
Read reviews — specifically
Google reviews, Trustpilot, and Checkatrade all provide genuine customer feedback. Look for consistent themes over many reviews, not just the most recent ones. Pay particular attention to how complaints are handled — every company gets some negative reviews; how they respond tells you more than the review itself.
Get a detailed written quote
A trustworthy installer provides a written quote that itemises: boiler model, flue, filter, controls, labour, VAT, warranty terms, and what certificates you'll receive. Vague "supply and fit" quotes invite hidden extras.
Ask about aftercare
What happens if something goes wrong post-installation? A good installer is contactable and responsive, not impossible to reach once they've been paid.
Our credentials
Gas Safe registered, Worcester Bosch Accredited, fully insured, and with hundreds of verifiable reviews across Corby and Northamptonshire. Get a quote from us.