Commercial Gas Servicing by Gas Safe registered commercial engineers
We provide commercial gas servicing for businesses, landlords and facilities managers across London. Every commercial building that burns gas relies on pipework, appliances and safety controls that must be installed, maintained and tested by an engineer holding the right non-domestic Gas Safe categories. Our engineers carry commercial competencies (COCN1, CENWAT, ICPN1, TPCP1A and related ACS qualifications), so the work we sign off is valid for insurers, landlords, local authority inspectors and fire risk assessors.
Commercial Gas Servicing is part of our commercial gas services work. Whether you manage one site or a portfolio, you get the same engineers, the same standards and clear paperwork after every visit.
Commercial gas work is different from domestic work. Loads are larger, pipework runs further and safety controls such as interlocks, valve proving and flame supervision are more complex. That is why we only send engineers who work on commercial installations every day and know the equipment found in London plant rooms and kitchens.
What's included
- Strip-down and cleaning of burners and heat exchangers
- Combustion analysis and gas rate checks
- Safety device and flue integrity testing
- Service report with readings and recommendations
Before arranging a visit for Commercial Gas Servicing
Start with the reason for the visit: a new supply, a recurring fault, a planned service or an urgent loss of gas. The engineer needs to know which appliances are affected, whether the problem is isolated to one item or the whole building, and whether anybody has already turned off a valve. An appliance data plate, previous service report and clear access to the meter and plant room help separate a supply problem from an appliance fault. A report of a gas smell is treated as a safety issue, not a routine booking.
When you contact us about Commercial Gas Servicing, describe what has changed since the equipment last worked normally. Include the make and model if you can read them safely, the number of affected appliances and any previous repair or inspection findings. Do not remove covers or attempt a reset repeatedly to collect this information. These details help define the visit, but they do not replace an on-site assessment by an appropriately qualified engineer.
What each part of the work involves
The scope below follows the work listed for Commercial Gas Servicing. Not every installation needs the same action: the engineer will confirm what applies to your site before work starts and explain any additional work that a test or inspection identifies.
Strip-down and cleaning of burners and heat exchangers
For Commercial Gas Servicing, this starts with confirming the equipment and the boundary of the work at the premises. The step listed as “Strip-down and cleaning of burners and heat exchangers” is not a box to tick from a description alone: the engineer needs access to the actual installation and its operating information. The result informs the next part of the visit, “Combustion analysis and gas rate checks”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Gas Services, the correct test method and acceptance criteria depend on the appliance or installation, not on a generic checklist. Ask which readings or observations support the conclusion, what they mean for safe use now, and what remains to be done before the next planned visit.
Combustion analysis and gas rate checks
At this stage of Commercial Gas Servicing, the step “Combustion analysis and gas rate checks” must be assessed against the equipment that is actually fitted. The engineer checks whether earlier alterations, site conditions or manufacturer instructions change the proposed approach. The result informs the next part of the visit, “Safety device and flue integrity testing”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Gas Services, the correct test method and acceptance criteria depend on the appliance or installation, not on a generic checklist. Ask which readings or observations support the conclusion, what they mean for safe use now, and what remains to be done before the next planned visit.
Safety device and flue integrity testing
The practical work includes the step “Safety device and flue integrity testing”. It should be coordinated with the person responsible for the site, particularly if an appliance or supply must be isolated while the work is in progress. The result informs the next part of the visit, “Service report with readings and recommendations”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Gas Services, the correct test method and acceptance criteria depend on the appliance or installation, not on a generic checklist. Ask which readings or observations support the conclusion, what they mean for safe use now, and what remains to be done before the next planned visit.
Service report with readings and recommendations
Before the Commercial Gas Servicing visit is closed, the step “Service report with readings and recommendations” needs a clear recorded outcome. The engineer should explain any limitation or further action instead of leaving an unexplained result on a form. The final record should distinguish completed tests from recommendations, and identify anything that has deliberately been left out of service. For Commercial Gas Services, the correct test method and acceptance criteria depend on the appliance or installation, not on a generic checklist. Ask which readings or observations support the conclusion, what they mean for safe use now, and what remains to be done before the next planned visit.
Choosing the right next step
The next step depends on the condition of the installation. A repair may be appropriate when a failed component can be identified and the rest of the system remains sound. Repeated shutdowns, obsolete controls or undocumented alterations may instead call for a wider survey. If a new appliance is proposed, the existing pipe size, available pressure, ventilation and flue route must be considered together. Replacing a boiler or cooker without checking its supply can leave the original problem unresolved.
A quotation or visit description should tell you whether the aim is to diagnose, make safe, repair, install, inspect or commission. Those are different outcomes. For Commercial Gas Servicing, ask whether an interruption to the gas supply is expected, whether other trades or the site manager must attend, and which checks are needed before equipment can be put back into use. If a fault persists after an earlier repair, share the earlier findings so the engineer can investigate the whole sequence rather than repeating the same intervention.
How the job runs
- Call or book online. Tell us the site, the equipment and the problem. We confirm an arrival window, usually the same or next day.
- Survey and safety check. The engineer checks the installation, confirms the scope and explains anything unsafe before starting.
- The work. Strip-down and cleaning of burners and heat exchangers, then the remaining tasks above, carried out with minimal disruption to your staff and customers.
- Testing and paperwork. Everything is tested before we leave and you receive a written record you can hand to your insurer or landlord.
Standards we work to
Work is carried out to the Gas Safety (Installation and Use) Regulations 1998, IGEM/UP/1 and IGEM/UP/1A for testing and purging, IGEM/UP/2 for installation pipework, BS 6644 for larger boiler plant and BS 6173 for catering appliances. Every engineer carries a Gas Safe ID card showing their non-domestic categories, and calibrated test equipment is used on every job.
Records and handover for Commercial Gas Servicing
Ask for a record that identifies the equipment, the work undertaken, measured results where relevant and any outstanding defects. Keep it with the building's gas records rather than treating the certificate as a substitute for maintenance. Where work is staged, distinguish what was made safe today from what still requires repair or commissioning. The engineer should explain any isolation clearly to the person responsible for the premises before leaving.
Keep the visit report with any earlier certificates, drawings and manufacturer instructions for the same equipment. If the engineer recommends follow-up work, record who will arrange it and whether the affected item may be operated meanwhile. This is particularly important where a site changes shifts or where the person booking the visit is not the person operating the equipment. Ask for clarification before the engineer leaves if the outcome or next step is unclear.
Who we work for
Our commercial gas servicing customers include offices, restaurants, hotels, schools, care homes, churches, warehouses, retail units and residential blocks with communal plant. We regularly work out of hours and at weekends so kitchens can keep trading and buildings stay open. Managing agents and FM companies can set up an account for multiple sites with consolidated records.
Why choose us for commercial gas servicing
- Commercial-only Gas Safe registered engineers
- Same-day response available across London
- Written reports and certificates for every visit
- Fixed quotes for planned work, no hidden extras
- Out-of-hours and weekend appointments
Planning, access and cost
Most commercial gas servicing jobs can be planned around your opening hours. Tell us about access arrangements, permits, parking and any restricted areas when you book, and send photos of data plates or fault codes if you have them, so the engineer arrives with the right parts. For planned work we confirm a fixed price in writing before we start. For reactive call-outs the first hour covers attendance and diagnosis, and we will not carry out further chargeable work without your approval.
Staying safe between visits
If you smell gas, turn off the supply at the emergency control valve, open doors and windows, avoid operating electrical switches and call the National Gas Emergency Service on 0800 111 999 before calling us. Keep plant rooms clear of storage, keep ventilation grilles unobstructed and log any lockouts or unusual noises. Good records help our engineers find faults faster and keep your certificates straightforward to renew.
Areas covered
We provide commercial gas servicing throughout Greater London, including City of London, Westminster, Camden, Islington, Hackney, Tower Hamlets, Southwark, Lambeth, Kensington & Chelsea, Hammersmith & Fulham, Wandsworth, Greenwich, Lewisham, Newham, Croydon, Bromley, Barnet, Brent, Ealing, Hounslow, Hillingdon, Harrow, Enfield, Haringey and every other London borough.