This standard applies to the installation of a gas boiler used for residential purpose {means the case
where a gas boiler is used in a house, etc. as an individual exhaust type or for individual heating
and, in the case where a gas boiler is used for central heating in an apartment, etc. or two or more
gas boilers are used being connected with a flue pipe in a house, KGS GC209 (Installation/Inspection
Code for Commercial and Industrial Gas Boilers) shall be applied} among the water heaters (exclusive
of open type water heaters) and hot water boilers (hereinafter referred to as "gas boilers") pursuant
to Attached Table 7, Subparagraph 4, Item i of the 「Enforcement Regulations of the Safety Control
and Business of Liquefied Petroleum Gas Act」. However, the cases of the gas boilers of which the
gas consumption exceeds 232.6 ㎾ (200,000 ㎉/h) and the gas boilers which satisfy all the following
conditions from (1) to (3) are excluded:
(1) Gas boilers controlled by a safety manager pursuant to the 「Safety Control and Business of
Liquefied Petroleum Gas Act」 (hereinafter referred to as "LP Gas Act”) and the「Urban Gas Business
Act」 (hereinafter referred to as “Urban Gas Act”) or an operator of the equipment subject to
inspection pursuant to 「Energy Use Rationalization Act」
(2) Gas boilers installed in the same room with a combustor that uses any other fuel than LPG and
urban gas or a combustor of which the gas consumption exceeds 232.6 ㎾ (200,000 ㎉/h)
(3) Gas boilers equipped with a backflow preventer to prevent exhaust gas from flowing backward
during operation or in a stationary state