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Commercial Boiler Servicing in Preston — What a Proper Annual Service Covers
Published 1 October 2026 · SMR Gas Maintenance Ltd
Most commercial boiler failures give warning signs months before they stop. A proper commercial boiler servicing visit in Preston catches those signs, keeps your plant safe, and gives you the paperwork your insurer and landlord expect.
SMR Gas Maintenance Ltd services commercial and industrial boilers across Preston, Lancashire and the North West. Gas Safe 562186.
What counts as a commercial boiler?
Commercial boilers are usually larger than domestic units and serve factories, warehouses, workshops and industrial units. Many sit in dedicated plant rooms and run as modular or cascade systems. They need engineers qualified for commercial gas work, not domestic-only engineers.
What a proper annual service covers
Safety checks
- Gas tightness and pressure checks on the installation
- Flame supervision and safety shut-off devices proved working
- Flue integrity, terminations and draught checked
- Plant room ventilation checked against the boiler's needs
Combustion and efficiency
- Combustion analysis with readings recorded
- Burner cleaned and set up to the manufacturer's figures
- Heat exchanger inspected and cleaned where needed
Controls and system
- Controls, sequencing and time settings checked
- Pumps, pressurisation units and expansion vessels looked at
- Condensate traps and drains cleared on condensing boilers
Records
You should receive a written service report with readings, any defects found, and clear recommendations. On larger sites, that record feeds your PPM plan.
How often should a commercial boiler be serviced?
At least once a year for most sites. Heavily used plant, process boilers and sites that cannot afford downtime often benefit from a six-monthly visit. Book the main service before the heating season starts, so problems are fixed before the first cold snap across Lancashire.
Signs you need an engineer before the service is due
- Boilers locking out or needing resets
- Rising gas bills with no change in use
- Noisy burners, banging or kettling
- Soot, staining or a smell of fumes near the flue
- Uneven heating across the building
If you smell gas, isolate the supply if it is safe to do so, ventilate, and call the National Gas Emergency number first.
Preston and Lancashire sites we cover
SMR looks after commercial boilers in Preston, Leyland, Chorley, Blackburn, Lancaster, Blackpool and across the North West. We can combine boiler servicing with radiant heaters, warm air heaters and process plant on the same visit.
FAQ
Is a commercial boiler service a legal requirement
Employers and landlords have duties to keep gas appliances safe. An annual service by a qualified commercial engineer is the usual way to show that, and most insurers expect it.
Can you service several boilers on one site?
Yes. Plant rooms with multiple boilers are normal for us, and we record each one separately.
Do you issue a certificate?
Yes. You receive a written service record and the relevant commercial gas safety paperwork for the work done.
Do you cover breakdowns as well?
Yes. SMR offers 24/7 breakdown cover alongside planned servicing.
Book commercial boiler servicing in Preston
Call 07882 898492 (24/7) or email andy@smrgasservices.co.uk to book a commercial boiler service or a PPM contract with SMR Gas Maintenance Ltd. See also our industrial boiler and steam plant servicing page.
industrial boiler and steam plant servicing page