ClassА – non-
ammable
Stone, bricks, ceramic les,
baked clay, soluons, plaster
free of organic addives.
Class B
– hardly
ammable
Gypsum board panels,
basalt ber needled felt,
berglass board, AKUMIN,
Izomin, Rajolit, Lignos,
Velox, Heraklit.
Class С1/С2
Medium
ammable
Wood beech, oak. Wood
sowood, layered wood
Class
C3 – easy
ammable
Asphalt, cardboard,
cellulose, tar, berboard,
cork, polyurethane,
polyethylene.
Diagram1. Recommended clearances between boiler and walls.
1.2.3. Minimum clearances for
installaon and ammability of
construconmaterials
The applicable minimum clearances in
your country may dier from the ones
specied below. Please, consult your
installer.
The minimum distance from the burner,
heang boiler or exhaust gas pipe to
objects or walls must be at least 200 mm.
Table 2.
Flammability of construcon materials
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