Specification for the installation and maintenance of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases)|Installation, Heating equipment, Condensation, Combustion products, Gas pipes, 3rd family gases, Position, Selection, Chimneys, Commissioning, Flow rates, 2nd family gases, Gas-powered devices, Boiler rooms, Size, Vent pipes, Flues, Hot-water boilers, Pipes, Inspection, Boilers, Maintenance, Safety valves, Gas supply, Ventilation