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Qualified installer, gas type compliance, and safety for unvented systems.
Compliance with Gas Safety, Building, IEE regulations and local byelaws.
Feed water quality, adequate water flow, and minimum system pressure.
Consultation with gas region, meter adequacy, pipework, isolation valve, and boosted supplies.
Natural draught flue design, waste gas data, materials, and location considerations.
Pressure relief valves, vent pipes, and safety for unvented pressurised systems.
Appliance earthing, mains supply connection, site wiring, and cable routing.
Gas pipe fitting, flue connection, gas connection, and water connections.
Electrical, gas, and water system checks before boiler commissioning.
Boiler commissioning procedure, pre-lighting checks, and initial pilot lighting.
Summary of safety features and common causes of boiler lockout.
Recommended annual servicing, safety precautions, and power/gas isolation.
General