BS 6644:2005+A1:2008
Specification for installation of gas-fired hot water boilers of rated inputs of between 70kW (net) and 1.8 MW (net) (2nd and 3rd family gases)
https://doi.org/10.3403/03291691 (published 08/07/2005)
BS 6644:2005+A1:2008 is maintained by GSE/30. This standard is available from the following sources:
Other historical versions of this standard document also exist:
- BS 6644:2011 [current until 21/01/2013]
- BS 6644:1991 [current until 08/07/2005]
- BS 6644:1990 [current until 31/10/1991]
- BS 6644:1986 [current until 31/07/1990]