※As shown in the image below, if an inflammable material finished with
non-inflammable coating, it is not considered as non-inflammable structure and
separation distance from the wall must be secured. Even if the surface is
non-inflammable, the internal structure may catch fire. If separation distance
between the machine and the building cannot be secured, thicken the
non-inflammable coating so the surface temperature of the inflammable material
does not exceed 100℃.
※1Non-inflammable materials are the following under Building Standards Act.
Concrete, bricks, roof tiles, porcelain tiles, asbestos slates, fiber reinforced
cement board, glass fiber cement board (not thinner than 3mm), fiber calcium
silicate board (not thinner than 5mm), steel, aluminum, metal board, glass,
mortar, plaster, stones, gypsum board (not thinner than 12mm, base paper of
the board thinner than 0.6mm), rock wool, glass wool board, etc.
※2Heat protection board is to cover the
surface of inflammable material in the
structure where a thermal machine is
installed so as to contain its surface
temperature less than 100℃.
(Non-inflammable material must be used for
heat protection board)
※3Separation distance is the distance to separate a thermal machine and exhaust
duct with exhaust hood from inflammable articles to secure fire safety. It is
the distance to separate the machine from surrounding inflammable articles to
prevent fire, in the case the machine is installed in “a part of the buildings with
a finish by materials other than non-inflammable materials or any other similar
finish”.
※4 A non-inflammable structure is a structure both the base and the finish of
which are made from non-inflammable materials.
