According to the current standard (LVS 420:2021 “Gas appliances. Gas appliance installation regulations."), up to 39 different controls shall be performed during the survey of the heating appliance, including: checking and cleaning of heat exchanger and burner, checking the density of water and gas supply parts, checking of ignition burners and safety controls in operation, checking the operation of apparatus and draught control apparatus, visual inspection of the flue gas path to the chimney.
Gas boiler maintenance service by a professional, certified technician once per year




