OFTEC, the Oil Firing Technical Association, runs the competent person scheme for oil heating in the UK. An OFTEC registered engineer, properly called a registered technician, has passed assessments in the installation, commissioning and servicing of oil-fired appliances and tanks, is inspected by the scheme and can self-certify their work under the Building Regulations. For an oil boiler that means the same reassurance Gas Safe registration gives for gas: the work is done by someone qualified, it is certified, and the paperwork you need when you sell or claim on a warranty exists.
Unlike gas, the law does not make it an offence for an unregistered person to work on an oil boiler. That makes it more important, not less, to understand what OFTEC registration means and to check for it. This guide explains the scheme, what a registered technician can do, how to check a registration and the risks of going without.
What OFTEC covers
OFTEC registration is broken into categories, and a technician is registered for the ones they have been assessed on. The main ones for a homeowner are:
- Installation of oil-fired appliances, including boilers, cookers and stoves.
- Commissioning and servicing of pressure jet burners, which covers almost every domestic boiler.
- Oil storage tanks, their siting, installation and inspection.
- Vaporising burners, found on some cookers and older appliances.
Many OFTEC technicians are also registered for unvented hot water cylinders and for solid fuel or renewables under related schemes. The categories are shown on the technician’s registration card.
Why registration matters for oil
Building Regulations
Installing or replacing an oil boiler or tank is controlled work. A registered technician notifies the job through OFTEC and you receive a Building Regulations compliance certificate. Without a registered technician, the work has to be inspected and approved by the council’s building control, at a fee, or it is not certified at all, which matters when you sell. Our guide to the boiler installation certificate explains the paperwork.
Warranties
Manufacturers require oil boilers to be installed, commissioned and serviced by an OFTEC registered technician, with the Benchmark checklist completed. An unregistered installation voids the warranty.
Insurance
Home insurers can refuse claims involving fire, oil spills or carbon monoxide if the appliance was installed or maintained by someone unqualified. Oil tank spills in particular can be extremely costly to clean up, and insurers look hard at who installed and inspected the tank.
Safety and efficiency
Oil burners have to be set up with a combustion analyser and a smoke test to burn cleanly. An unregistered fitter without the equipment or training leaves a boiler that soots, smokes and wastes oil, or worse, one that leaks combustion gases.
How to check an OFTEC registration
Every registered technician carries a photo ID card with a registration number and the categories they are assessed for. Ask to see it. You can also search the OFTEC website for a technician by name, number or postcode, which confirms the registration is current and lists the categories. A company can be OFTEC registered as a business, but the individual doing the work should still hold the relevant categories.
OFTEC versus Gas Safe
Gas Safe is a legal requirement for anyone working on gas. OFTEC is the equivalent competent person scheme for oil, backed by Building Regulations rather than a specific criminal offence. A heating company that works on both fuels, like DCI Boilers, holds both registrations, and its engineers carry both cards. Our guide on whether you can install your own boiler explains the legal difference between the two fuels.
What to expect from a registered technician
- a survey of the boiler, tank and fuel line before quoting
- a fixed written quote
- installation to the manufacturer’s instructions and the relevant standards
- commissioning with a combustion analyser and smoke test, recorded on the Benchmark checklist
- warranty registration and OFTEC notification for the compliance certificate
- an annual service with a new nozzle, filter and combustion test
Our guide to oil boiler installation walks through the job.
How DCI Boilers can help
DCI Boilers is OFTEC registered for oil boilers and tanks and Gas Safe registered for gas, working across Cornwall and Devon from a base near Saltash. Every oil installation is surveyed, fitted, commissioned and certified by a registered technician at a fixed price, with manufacturer warranties of up to 12 years. Read about our oil boiler replacement service, or book boiler servicing for an existing oil boiler.
Need help now? Call DCI Boilers on 07888 862 603 or get a free quote.
Frequently asked questions
Is it illegal to have an unregistered person service my oil boiler?
Not in the way it is for gas, but it can void the warranty, affect insurance and leave the boiler badly set up. Installations must be certified either by OFTEC or by building control.
Can a Gas Safe engineer work on an oil boiler?
Only if they also hold OFTEC registration. The two schemes cover different fuels and different assessments.
Does OFTEC cover oil tanks?
Yes. Tank installation and inspection is a separate OFTEC category, and a registered technician can certify a new tank.
How do I find an OFTEC engineer near me?
Search the OFTEC website by postcode, or ask any heating company to show you the card and categories before they start.