Commercial LPG heating
Commercial engineers covering Suffolk, Essex and Cambridgeshire
Winter gas safety: smell gas? Call National Gas Emergency on 0800 111 999. For commercial boiler breakdowns call 0800 0996 007.
Commercial LPG boilers and heating systems need safe, dependable servicing and practical fault support across East Anglia and the Sudbury CO10 area.
Much of rural Suffolk, north Essex and south Cambridgeshire is off the mains gas network, so many businesses heat their buildings and hot water with liquefied petroleum gas (LPG) from a bulk tank or a cylinder bank. Our team of over 10 local engineers, working from Clare (CO10 8NN), supports commercial LPG boilers, water heaters and heaters across that area.
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For commercial clients
We support businesses, holiday parks and park home sites with LPG boiler servicing, heating repairs, plant-room checks and planned maintenance discussions where suitable.
Typical commercial LPG sites include:
- Holiday parks and park home sites: reception buildings, clubhouses, shower blocks and pool plant.
- Rural pubs, restaurants and hotels: heating plus high hot-water demand at set times of day.
- Farm offices, workshops and rural business parks: offices, units and workshops on converted farm sites.
- Village halls, churches and community buildings: plant that runs only a few hours a week.
- Schools, nurseries and care settings off the gas main: buildings where heating and hot water have to be reliable.
- Warehouses and industrial units: LPG warm air and radiant heaters as well as boilers.
What we can help with on LPG plant
- Servicing of commercial LPG boilers and burners, including combustion analysis and safety device checks. See commercial boiler servicing.
- Breakdowns and lockouts: fault finding on ignition, flame detection, gas valves, controls, pumps and pressurisation units. See plant room repair.
- Gas safety checks and records for LPG appliances, flues and installation pipework. See commercial gas safety inspection.
- Tightness testing and purging of site pipework, for example after a tank run-out or alterations.
- Warm air and radiant heaters running on LPG in workshops, warehouses and agricultural buildings.
- Planned maintenance: LPG plant can sit in the same schedule as gas, oil and hot-water plant. See planned preventative maintenance.
- Replacement planning when an LPG boiler is near the end of its life. See commercial boiler installation.
How commercial LPG differs from mains gas
Most of the boiler is the same. The parts that differ are the ones that matter most for safety and reliability:
- LPG is heavier than air. Escaped natural gas rises, but escaped LPG sinks and collects at low points such as pits, ducts, cellars and floor voids. Low-level ventilation, and where the plant sits, therefore matter more on LPG sites.
- Below-ground plant is restricted. The Gas Safety (Installation and Use) Regulations 1998 put tight limits on LPG appliances in basements and cellars, so check before you plan plant below ground level.
- Appliances must be set up for LPG. A boiler or heater built for natural gas cannot simply be connected to propane. Burner parts and gas valve settings differ, and a conversion must use the manufacturer's approved parts and be commissioned by a competent Gas Safe registered engineer.
- The supply has its own equipment. Bulk tanks feed the site through regulators, often with over-pressure and under-pressure shut-off devices. A fault or a low tank can show up at the boiler as a lockout even when the boiler itself is fine.
- Responsibilities are split. On most bulk supplies the tank, and often the equipment at the tank, belongs to and is maintained by your LPG supplier under the supply agreement. The pipework from there to your appliances, and the appliances themselves, are normally the site's responsibility. Your supply agreement says exactly where the line is.
Common LPG faults on commercial sites
- Tank run-out. If the tank empties, appliances lock out and a shut-off device on the supply may trip. After the delivery, the system may need resetting, purging of air, a tightness test and each appliance relighting and checking before the building is warm again.
- Pressure dips in cold weather. A tank turns liquid into gas more slowly in cold weather and when the liquid level is low. On sites with a large heating load this can starve burners at the busiest time, which shows as hard starts or repeated lockouts on cold mornings.
- Regulator problems. A failing or iced regulator can give low or unstable pressure. The supplier's equipment is for the supplier to deal with; we check the pressure at the appliances and the site pipework so you know which side the problem is on.
- Cylinder changeover issues. Where cylinder banks are used, an automatic changeover valve that does not switch over cleanly can leave plant without gas while full cylinders sit unused.
- Burner and ignition faults. As on any commercial boiler: worn electrodes, failing flame sensors, dirty burners and faulty gas valves.
If you smell gas on an LPG site
Do not use naked flames, and do not operate electrical switches near the smell. Turn off the supply at the emergency control valve or at the tank if it is safe to do so, open doors and windows, and get people away from low areas where gas can collect. Then call your LPG supplier's emergency line: the number is usually shown on the tank or on your delivery paperwork. Do not use the appliances again until a competent engineer has made the installation safe.
What to have ready when you call
- The site address and the type of building.
- Whether you have a bulk tank or cylinders, and who your LPG supplier is.
- The make and model of each boiler or heater. Photos of the data plates help.
- Any fault codes or lockout lights, and whether the tank was recently low or refilled.
- Plant-room access arrangements and the times the building is in use.
What an LPG boiler service covers
A commercial LPG boiler gets the same core service as any commercial boiler service, with extra attention on the parts that are different on propane. On a typical visit our engineers:
- check the appliance is set up for LPG, using the data plate, the burner parts and the gas valve settings, and that nothing has been swapped for natural gas parts;
- measure the working gas pressure at the appliance while it is firing at full rate, with other plant on the site running too where possible, so a pressure drop under load shows up;
- clean and inspect the burner, electrodes and flame sensor, and take combustion readings with a calibrated analyser;
- test the flame supervision, gas valve and safety controls so the boiler shuts down safely when it should;
- inspect the flue, its joints and terminal, and check that the ventilation openings, especially the low-level ones, are clear of leaves, stored stock and anything else that could block them;
- look at the site pipework where it can be seen, including entry points through walls, supports and signs of corrosion, and check the emergency control valve is easy to reach and labelled;
- write up the results, any defects and the recommended remedy, so you have a clear record for insurers and for the next visit.
Where the site also needs a safety record for the appliances and installation, the commercial gas safety inspection can be done on the same visit. Our guide to LPG heating safety checks covers the checks in more detail.
Is it the boiler or the supply? A quick guide
On LPG sites the first question is often which side of the line the fault is on. This table is a rough guide only; an engineer will confirm on site.
| What you see | Often points to | What we check |
|---|---|---|
| Every LPG appliance on site goes out at once | The supply: empty tank, a tripped shut-off device or a regulator fault | Pressure at the first appliance; then we tell you whether to call your supplier |
| One boiler locks out on cold mornings, then runs later in the day | Pressure drop under full load, or a burner set-up problem | Working pressure with all plant firing, burner and gas valve settings |
| Hard starts or failed ignition just after a delivery | Air in the site pipework after a run-out | Purging, a tightness test and relighting each appliance |
| One boiler locks out at any time of day | The boiler itself: ignition, flame sensing, gas valve or controls | Fault finding on the appliance, as on any commercial boiler repair |
| Yellow or lifting flames, soot or a smell of fumes | Poor combustion or a flue problem | Stop using the appliance and call us; it is made safe before anything else |
Keeping a simple record of when and how plant locks out makes this much quicker. Our lockout log sheet is a good starting point.
Getting an LPG site ready for winter
- Tell your supplier about changes in load. If you have added a boiler, a water heater or warehouse heaters since the tank was sized, the supply may not keep up on cold days. Sizing the tank and its equipment is a job for the supplier, so give them the new list of appliances.
- Do not let the level run low in a cold spell. A low tank gives off gas more slowly, just when demand is highest. Check the gauge or telemetry more often in winter and order early.
- Book the service before the heating season. Late summer or early autumn gives time to fix defects before the plant is relied on. LPG plant can sit in the same planned maintenance schedule as gas and oil plant.
- Protect plant in buildings that are left empty. Village halls, churches, clubhouses and seasonal buildings need frost protection set and tested. See our frost protection guide.
- Keep low-level areas clear. Because LPG is heavier than air, do not store stock or rubbish against low-level vents, and keep pits and ducts near plant clear and dry.
Seasonal sites: closing down and opening up
Holiday parks, campsites, sports clubs and event venues often run LPG plant hard for part of the year and lightly or not at all for the rest. At the end of the season, agree with us which plant is being shut down and which must stay on for frost protection. Before reopening, book a recommissioning visit: relighting, combustion checks, safety device tests and a check of flues and ventilation that may have been blocked by nests or debris over the closed months. Our hospitality sector page covers the hot-water side for reception buildings, bars and shower blocks, and our churches and community halls page covers buildings with only a few hours of use each week.
Changing fuel: oil to LPG, or LPG to mains gas
Moving from oil to LPG means new or converted burners, a tank or cylinder position agreed with the LPG supplier after their own site survey, new pipework into the building, and a flue and ventilation check for the new appliances. It is a good time to review the whole plant room; our replacement planning guide sets out the steps. If you are staying with oil for now, our oil-fired commercial heating page explains the support our OFTEC trained engineers give.
Moving from LPG to mains gas when the gas main reaches a site is not just a change of supply. Some appliances can be converted with the manufacturer's approved parts and some cannot. Natural gas carries less energy per cubic metre than LPG, so pipework that was big enough for LPG may be too small for the same output on natural gas, and has to be checked. The LPG tank and its equipment are taken out of service by the supplier. Our commercial boiler installation team can survey the plant and give you the options.
Warehouses and workshops running LPG warm air heaters or radiant tubes can read our guides to warm air heat exchanger inspection and radiant tube heater maintenance, and our industrial and warehouse page.
LPG heating questions we get asked
Can you work on our LPG boilers if the tank belongs to our supplier?
Yes. On most bulk supplies the supplier looks after the tank and the equipment at the tank, and we look after the site pipework and the appliances. We check pressures at the appliances and the pipework, and if the problem is on the supply side we tell you what we found so you can pass it to your supplier.
Why do our LPG boilers lock out on the coldest mornings?
Common causes are a drop in supply pressure when every appliance starts at once in cold weather, a low tank level, a regulator problem, or a burner or ignition fault. We measure the working pressure at the appliance while it is firing, which shows whether the boiler or the supply is the cause.
What happens after our LPG tank runs out?
Once the supplier has refilled the tank and reset its equipment, the site pipework may need purging of air and a tightness test, and each appliance relighting and checking. Do not keep resetting appliances that will not light; call us on 0800 0996 007.
Can an LPG boiler be converted to mains gas when the gas main arrives?
Some can, using the manufacturer's approved conversion parts, and some need replacing. The pipework also has to be checked, because natural gas usually needs larger pipe sizes than LPG for the same output. We can survey the plant and explain the options.
Do LPG boilers need a gas safety check every year?
Yes. LPG appliances need the same care as natural gas ones. Under the Gas Safety (Installation and Use) Regulations 1998, employers and people in control of premises must keep gas appliances, flues and pipework in a safe condition, and a yearly service with a written gas safety record is the normal way to show it. Most insurers expect those records too.
Do you look after LPG warm air and radiant heaters?
Yes. LPG warm air heaters and radiant tube heaters in workshops, warehouses and farm buildings can be serviced and repaired alongside any LPG boilers on the same site.
Do you work on LPG at homes or caravans?
No. Fast Commercial Boiler Help is commercial only. On holiday parks we work on the commercial buildings, such as receptions, clubhouses, shower blocks and pool plant, not on individual holiday homes.
Gas Safe registration and checking an engineer
Gas and LPG work is undertaken by Gas Safe registered engineers (985448). Tell us about the site, equipment and access requirements so we can discuss the right next step.
Gas Safe engineers carry an ID card showing the types of gas work they are qualified to do. You can check any engineer's card on the Gas Safe Register. Where a site also has oil-fired plant, our OFTEC trained engineers can help. See oil commercial heating.
We work on commercial sites only: businesses, public and community buildings, holiday parks and other business premises.
Talk to an engineer
- Freephone: 0800 0996 007
- Call or WhatsApp: 07947 578332 (open WhatsApp)
- Email: info@fastcommercialboiler.help
- Base: 4 Market Hill, Clare, Sudbury, Suffolk CO10 8NN · contact page · sectors we work in