BS 6644:2011
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)
- Standard No.
- BS 6644:2011
- Release Date
- 2011
- Published By
- British Standards Institution (BSI)
- Status
- Replace By
- BS 6644:2011(2013)
- Latest
- BS 6644:2011(2013)
- Replace
- BS 6644:2005+A1:2008
- Scope
- This British Standard specifies requirements for the installation, including design, inspection, commissioning and maintenance, of gas-fired hot water boilers of net rated heat inputs exceeding 70 kW but not exceeding a net heat input of 1.8 MW. Groups of boilers with individual net heat inputs of 70 kW or less, but with aggregate net heat inputs in excess of 70 kW, are also covered. This British Standard is applicable to the installation of boilers that are designed to utilize normally distributed gases of Group H of the second family (e.g. natural gas), and gases of Group P (e.g. propane) and Group B (e.g. butane) of the third family. For the purposes of this installation standard, LPG/air mixtures are regarded as third family gases. This British Standard is applicable to the installation of the following gas-fired hot water boilers: Boilers supplied as a complete assembly and conforming to BS EN 656 or BS 5978 (all parts); Boilers supplied as a complete assembly and used in multiple boiler installations where the total net heat input exceeds 70 kW and conforming to BS EN 297, BS EN 483 or BS EN 677; Boilers and burners delivered separately and assembled on site, comprising: 1) a boiler shell conforming to BS EN 303-1, BS EN 12952 (all parts), BS EN 12953 (all parts), BS 779, BS 855 or BS 2790; 2) a burner conforming to BS EN 676; 3) an assembly conforming to BS EN 303-3 or BS 5987-1 and BS 5978-3.
BS 6644:2011 Referenced Document
- BS 1212-1 Float operated valves - Specification for piston type float operated valves (copper alloy body) (excluding floats)
- BS 1212-2 Float operated valves — Part 2 : Specification for diaphragm type float operated valves (copper alloy body) (excluding floats)
- BS 1212-3 Float operated valves — Part 3 : Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)
- BS 2790 Specification for Design and manufacture of shell boilers of welded construction
- BS 5978 Safety and performance of gas-fired hot water boilers (60 kW to 2 MW input) - Specification for additional requirements for boilers with forced or induced draught burners
- BS 7671 Requirements for Electrical Installations. IET Wiring Regulations*， 2022-03-28 Update
- BS 779 Specification for cast iron boilers for central heating and indirect hot water supply (rated output 44 kW and above)
- BS 855 Specification for welded steel boilers for central heating and indirect hot water supply (rated output 44 kW to 3 MW)
- BS EN 12952 Water-tube boilers and auxiliary installations. Part 9. Requirements for firing systems for pulverized solid fuels for the boiler
- BS EN 12953 Shell boilers - Requirements for limiting devices of the boiler and accessories
- BS EN 1856-1 Chimneys. Requirements for metal chimneys. System chimney products
- BS EN 1856-2 Chimneys. Requirements for metal chimneys. Metal flue liners and connecting flue pipes
- BS EN 1993-3-2 Eurocode 3. Design of steel structures - Towers, masts and chimneys - Chimneys
- BS EN 297 Gas - fired central heating boilers — Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW
- BS EN 303-1 Heating boilers. Heating boilers with forced draught burners. Terminology, general requirements, testing and marking*， 2017-09-21 Update
- BS EN 303-3 Heating boilers — Part 3 : Gas - fired central heating boilers — Assembly comprising a boiler body and a forced draught burner
- BS EN 483 Gas-fired central heating boilers - Type C boilers of nominal heat input not exceeding 70 kW
- BS EN 676 Forced draught burners for gaseous fuels
- BS EN 677 Gas-fired central heating boilers - Specific requirements for condensing boilers with a nominal heat input not exceeding 70 kW
BS 6644:2011 history
- 0000 BS 6644:2011(2013)
- 2011 BS 6644:2011 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)
- 2005 BS 6644:2005+A1:2008 Specification for Installation of gas-fired hot water boilers of rated inputs between 70kW (net) and 1.8 MW (net) (2nd and 3rd family gases
- 2005 BS 6644:2005 Specification for Installation of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases)
