Schwank by Gas Safe registered commercial engineers
We provide schwank for businesses, landlords and facilities managers across London. Warehouses, factories, workshops and distribution centres are usually heated by gas-fired warm-air unit heaters or overhead radiant tube and plaque heaters. These appliances run long hours in dusty, high-bay buildings, so burners, heat exchangers, flues and fans need regular servicing to stay safe and efficient. Our engineers service, repair and install the main brands found across London's industrial estates.
Schwank is part of our commercial warehouse heaters 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
- Tube heater servicing
- Plaque heater cleaning
- Ignition repairs
- Controls checks
Before arranging a visit for Schwank
Identify whether the appliance is a warm-air heater, radiant tube or ceramic plaque unit, and record the make and model of each affected heater. Note the height, access route and whether lifting equipment or an operational shutdown is required. Describe if the fault occurs on startup, after the fan runs or during a long heating demand. Dust, storage close to heaters and changes to ventilation are useful observations to pass on, but should not be treated as a diagnosis.
When you contact us about Schwank, 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 Schwank. 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.
Tube heater servicing
For Schwank, this starts with confirming the equipment and the boundary of the work at the premises. The step listed as “Tube heater servicing” 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, “Plaque heater cleaning”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Warehouse Heaters, 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.
Plaque heater cleaning
At this stage of Schwank, the step “Plaque heater cleaning” 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, “Ignition repairs”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Warehouse Heaters, 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.
Ignition repairs
The practical work includes the step “Ignition repairs”. 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, “Controls checks”; if the first check reveals a defect, the sequence may need to change for safety. For Commercial Warehouse Heaters, 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.
Controls checks
Before the Schwank visit is closed, the step “Controls checks” 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 Warehouse Heaters, 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
Warm-air and radiant systems distribute heat differently, so replacement choices should reflect the building's occupied zones, door openings and working height. For a breakdown, distinguish a burner fault from fan, air-proving, thermostat or control problems before ordering parts. Flue routes, clearances and heat-exchanger integrity matter as much as successful ignition. Do not operate an appliance with a damaged heat exchanger or defeated overheat protection while waiting for a permanent repair.
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 Schwank, 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. Tube heater servicing, 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
Warm-air and overhead radiant heaters are installed and serviced to the manufacturer's instructions, BS 6230 for industrial and commercial gas-fired heating, IGEM/UP/10 for flueing and ventilation, and the Gas Safety (Installation and Use) Regulations 1998, with CP15 or CP17 records issued. 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 Schwank
Keep an asset record for each heater in large premises; a site with several similar units needs a clear indication of which one was serviced or isolated. Request the measurements and safety checks relevant to the particular heater and agree when inaccessible units can be inspected. Tell warehouse staff which zones remain heated and whether controls have been changed. Protect access to heaters and flues when storage layouts change after the visit.
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 schwank customers include warehouses, distribution centres, factories, workshops, garages, aircraft hangars, sports halls and garden centres. 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 schwank
- 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 schwank 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 schwank 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.