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
This British Standard specifies requirements for the installation, including design, inspection and
commissioning, 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 by this standard.
This 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 standard is applicable to the installation of gas-fired hot water boilers within the scope of:
a) for boilers supplied as a complete assembly, BS EN 656 or BS 5978 (all parts);
b) for boilers supplied as a complete assembly and used in multiple boiler installations whose total net
heat input exceeds 70 kW, BS EN 297, BS EN 483, or BS EN 677;
c) for boilers and burners delivered separately and assembled on site:
1) the boiler shell, BS EN 303-1, BS EN 12952, BS EN 12953 BS 779, BS 855, or BS 2790;
2) the burner, BS EN 676;
3) the assembly, BS EN 303-3 or BS 5987-1 and BS 5978-3.
BS 6644:2005+A1:2008 history
0000 BS 6644:2011(2013)
2011BS 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)
2005BS 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
2005BS 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)