4 Nov 2026 · 3 min read
What does it mean to be a Vaillant Approved Installer?
By Carlton Fuller · Founder & Master Gas Engineer, 30 years' experience

When you see a heating company described as a Vaillant Approved Installer, the status comes with real requirements: annual technical training, insurance and an audit of past installation quality. Here is what it means in practice.
What Vaillant requires to hold Approved status
- ◆All engineers must hold current Gas Safe registration covering domestic gas
- ◆Annual technical training on the current ecoTEC boiler range is compulsory
- ◆The company must carry adequate public liability insurance
- ◆Vaillant periodically audits installation quality and customer feedback
- ◆If standards drop, the Approved status is removed
What it means for you as a customer
- ◆You qualify for Vaillant's 10-year parts and labour warranty - the longest standard warranty in the mainstream boiler market
- ◆The engineer fitting your boiler has been trained on the specific model they are installing
- ◆Vaillant provides direct technical support to Approved Installers for complex faults
- ◆You are dealing with a company that Vaillant itself has vetted and approves
The warranty difference
A standard Vaillant installation carries a 2-year manufacturer warranty. Fitted by an Approved Installer, this extends to 10 years with registration. That is an additional 8 years of parts and labour cover on an appliance costing £1,500 to £3,000 to supply and fit. For a buy-to-let or a family home, that is a lot of repair cost you will not have to cover.
CAF Heating's Vaillant Approved Installer status
CAF Heating holds Vaillant Approved Installer status. All three of our engineers have completed Vaillant technical training and hold current Gas Safe registration. When we install a Vaillant boiler, you automatically qualify for the 10-year warranty - we register it on your behalf.
Get a free quote for a new Vaillant boiler with 10-year warranty from a Vaillant Approved Installer.
Get a free Vaillant quoteFrequently asked
Is a Vaillant Approved Installer the same as a Vaillant Advance Installer?
Vaillant has multiple tier levels in their installer scheme. Approved Installer is the standard accreditation. Advance and Elite tiers require additional training. All tiers qualify the customer for the 10-year warranty.
What happens to my warranty if my installer loses their Approved status later?
The warranty attaches to the installation, not the installer's current status. A valid warranty registered at the time of installation remains in force even if the company's status subsequently changes.
Can I get the 10-year Vaillant warranty with any Gas Safe engineer?
No. The 10-year warranty is only available when the boiler is installed by an Approved Installer and registered with Vaillant within 30 days of installation. A standard Gas Safe engineer qualifies for the 2-year warranty only.
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