Specification for installation of gas-fired forced convection air heaters for commercial and industrial space heating (2nd and 3rd family gases)1 Scope This British Standard specifies the installation requirements for direct and indirect gas fired forced convection air heaters for space heating that are designed for commercial or industrial applications and to which The Gas Appliances (Safety) Regulations 1995 [1] apply. This British Standard applies to the installation and maintenance of appliances that are designed to utilize gases of Group H of the 2nd family (e. g. natural gas), gases of

semi-automatically or manually

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