How Often Should Commercial Gas Appliances Be Serviced and Checked?

Commercial gas appliances should usually be serviced at least once every 12 months, unless manufacturer guidance or usage conditions require more frequent checks. In high-use or safety-critical environments, commercial gas safety inspections are essential and servicing every six months is often recommended as part of planned maintenance.

This guide explains how often commercial gas appliances should be serviced, who is responsible for servicing, what servicing includes, and why regular maintenance is essential for safety, compliance, and reliability.

How often should commercial gas appliances be serviced?

In most commercial buildings, gas appliances should be serviced at least annually.

Where manufacturer instructions are unavailable, health and safety guidance advises that annual servicing is a reasonable baseline to ensure appliances remain safe and fit for use. In practice, many facilities managers opt for more frequent commercial gas safety inspections and servicing of heavily used or business-critical appliances.

More frequent servicing may be appropriate when:

• Appliances operate for long hours or continuously
• Equipment serves vulnerable occupants, such as care or healthcare settings
• The appliance is part of a critical heating or hot water system
• The environment is demanding, such as in commercial kitchens

Planned maintenance schedules should reflect actual usage and risk, not just minimum intervals.

Why do commercial gas boilers require servicing annually?

Commercial gas safety inspections and boiler servicing should be conducted at least once per year to ensure safety and reliability.

Annual servicing helps identify developing faults before they cause breakdowns, lockouts, or safety risks. It also supports compliance by ensuring that safety devices, flues, and combustion performance operate correctly.

In some buildings, especially those with continuous heating demand, six-monthly servicing is recommended to reduce the risk of unexpected failure.

Who is responsible for gas safety in a commercial building?

Responsibility for gas safety in commercial premises usually sits with the property owner, landlord, or employer, depending on how the building is occupied and managed.

In general:

• Landlords or building owners are responsible for fixed gas installations and communal systems
• Employers or occupiers are responsible for appliances and pipework within their control
• Lease agreements may pass responsibility for appliances within demised areas to tenants

Duty holders must ensure that gas appliances, pipework, and flues are maintained in a safe condition and that records of servicing and safety checks are retained.

What is included in a commercial gas servicing visit?

A servicing visit typically includes commercial gas safety inspections, checks, performance testing, and condition assessment.

This may include:

• Visual inspection of appliances and pipework
• Checking the operation of safety devices and controls
• Inspection of flues and ventilation
• Combustion analysis where required
• Identification of leaks or signs of deterioration
• Recording findings and recommendations

Any identified defects or risks should be clearly documented, with advice on remedial actions and timescales.

Are gas safety inspections legally required for businesses?

Commercial gas safety inspections form part of an employer or landlord’s legal duty to ensure systems are safe.

While commercial gas safety requirements differ from those for domestic landlord certification, businesses must still demonstrate that their appliances and installations are maintained safely. Regular servicing and documented inspections are the primary means of meeting this duty.

Failure to maintain gas systems can expose duty holders to enforcement action, invalidated insurance, and serious safety risks.

How often should gas pipework be tested?

Gas pipework should be tested whenever its integrity may have been compromised.

Tightness testing and purging are typically required:

• On new pipework installations
• After alterations or extensions
• Following total loss of gas pressure
• When leaks are suspected
• Before recommissioning unused systems

Routine testing of existing pipework may also be carried out as part of planned maintenance or prior to major works.

What happens if commercial gas appliances are not serviced regularly?

Failing to service commercial gas appliances can lead to a range of problems, including:

• Increased risk of gas leaks or unsafe combustion
• Boiler lockouts and repeated breakdowns
• Loss of heating or hot water in occupied buildings
• Reduced efficiency and higher energy costs
• Non-compliance with health and safety duties

In many cases, emergency call-outs and unplanned repairs cost significantly more than routine maintenance.

Is planned maintenance better than reactive repairs?

Yes. Planned maintenance is almost always safer and more cost-effective than relying solely on reactive repairs.

Planned maintenance enables early issue identification, reduces emergency downtime, and provides a clear compliance trail. It also supports better budgeting by spreading costs and avoiding sudden failures.

For commercial gas systems, planned maintenance is particularly important due to the safety implications of failure.

When should commercial gas appliances be serviced more frequently?

More frequent servicing should be considered when:

• Appliances are used intensively, such as in catering environments
• The building operates continuously or out of hours
• Previous faults or deterioration have been identified
• The appliance supports vulnerable occupants
• Manufacturer guidance specifies shorter intervals

Maintenance schedules should always be reviewed if system behaviour changes or faults become more frequent.

When should you call a commercial gas engineer?

A qualified commercial gas engineer should be contacted if:

• A gas appliance repeatedly locks out
• A boiler keeps losing pressure
• There is no heating or hot water in the building
• You suspect a gas leak or smell gas
• Plant room alarms or pressurisation units fault

Duty holders should never bypass safety devices or attempt internal repairs themselves.

Summary: commercial gas servicing intervals

In most cases:

• Minimum servicing interval: once every 12 months
• Higher risk or heavy use: every six months
• Pipework testing: when installed, altered, or pressure is lost
• Records: should always be retained by the duty holder

Tailored building-specific maintenance is the safest approach.

How EIT Ltd Supports Commercial Gas Safety

EIT Ltd supports businesses with commercial gas servicing, inspections, planned maintenance, and reactive support. Our engineers work across occupied commercial buildings, helping duty holders manage risk, maintain compliance, and keep systems operating safely.

Speak to our team and get clear advice, compliant workmanship, and a team that understands live commercial sites.