A boiler service is a comprehensive examination, cleaning, and testing of a gas boiler to guarantee its safe and effective operation. A certified engineer cleans critical components, examines gas pressure and emissions, and looks for leaks, corrosion, and malfunctioning parts. Frequent maintenance prolongs the boiler's life, increases efficiency, and prevents malfunctions. After a certified Gas Safe engineer examines a property's gas appliances, piping, and flues, a gas safety certificate (CP12) is granted. It attests to adherence to legal safety requirements. For rental homes, landlords are required to get one every year in order to maintain both legal compliance and tenant safety. Regular inspections are also advantageous to homeowners.