HHSRS Hazard 9 - Uncombusted Fuel Gas

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If a tenant reports a property to the Council for a HHSRS Hazard 9 - Uncombusted Fuel Gas issue, the Council is legally obligated to inspect the property for all 29 hazards outlined in the Housing Health & Safety Rating System (HHSRS).

If the Council uncovers any Category 1 risks, it is obliged by law to take action against the landlord and any associated agents. This is not just a formality; it is a serious obligation that must be addressed.

Hazard 9 - Uncombusted Fuel Gas

This hazard covers the threat of asphyxiation resulting from the escape of fuel gas into the atmosphere within a dwelling.

Note: Poisonings associated with incomplete combustion of gas and the spilling back of combustion products into a dwelling are covered by Carbon Monoxide, and explosions from gas leakages are covered by Explosions.

The most common gas used in dwellings is mains gas (formerly known as natural gas), although there is now an increasing use of liquid petroleum gas (LPG) particularly in isolated and rural areas, and some use of landfill gas. Mains gas is primarily methane and is less dense than air, while LPG is denser than air. Both mains gas and LPG are odorised to have distinctive smells, to alert users to the danger of escaped gas.

Vulnerable Group: All ages

Defects & Justifications

Gas supply - the supply of gas from a non-authorised supplier.
Gas installations - defects to the installation, including pressure regulators, meters and pipework.
Gas appliances - defects to boilers, fires etc.
Maintenance defects - lack of evidence of regular testing and servicing of the gas installation and/or appliances.
Siting of appliances - locations adjacent to windows or doors where there is a risk of flames blowing out.
Gas detector provision - the lack of correctly sited detectors.
Defects to detectors.

Index of HHSRS Hazards

Rectifying the HHSRS Hazard 9 - Uncombusted Fuel Gas: Guidance Checklist

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How do I detect uncombusted fuel gas in a property?

Install gas detectors near appliances and ensure regular servicing of gas installations by Gas Safe registered engineers to identify leaks early.

What immediate steps should I take if I smell gas indoors?

Turn off the gas supply at the meter, open windows for ventilation, and avoid using electrical switches. Contact the emergency gas service immediately.

What maintenance actions help prevent gas leaks?

Annual servicing of gas appliances, checking pipework integrity, and replacing faulty seals or joints can significantly reduce risk.

Can poor ventilation increase the risk of gas buildup?

Yes, inadequate ventilation can cause uncombusted gas to accumulate indoors, raising the risk of explosion or poisoning. Ensure air vents and extractor systems are clear and functioning.

Are older properties more prone to uncombusted fuel gas issues?

Yes, older properties may have aging pipework and outdated appliances that are more likely to develop leaks or combustion problems.