BS EN 677:1998

Gas-fired central heating boilers. Specific requirements for condensing boilers with a nominal heat input not exceeding 70 kW|Boilers, Steam condensers, Heaters, Heating equipment, Hot-water boilers, Domestic, Central heating, Gas-powered devices, Design, Condensation, Combustion products, Temperature, Efficiency, Testing conditions, 1st family gases, 2nd family gases, 3rd family gases, Marking, Instructions for use, Installation, Performance testing, Hot-water central heating, Gas space heating, Formulae (mathematics), Error correction, Classification systems, Rated power Click the banner to get it at ONLY: GBP98.00