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BS 6644:1991
M00003149
New product
BS 6644:1991 Specification for installation of gas-fired hot water boilers of rated inputs between 60 kW and 2 MW (2nd and 3rd family gases)
standard by BSI Group, 10/31/1991
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Requirements for the installation of single and groups of boilers, selection and siting, open vented and sealed systems, controls and safety, air supply and ventilation, flues and commissioning.Also available as part of KIT 44.