9 Fabric tank
9.6 Room ventilation
The air with which the pellets are blown in must be able to escape. A cross section of at least 170 cm² must be
provided. Wall penetrations, windows, empty chimneys are permissible. The fabric tank consists of filter fabric -
therefore dust does not accumulate . Extraction of the blow-in air is not necessary.
9.7 Fire safety
9.7.1 Austria
The fabric tank must be set up in a different room that is separated from the boiler. The enclosing walls and the
ceiling of the set-up room must satisfy the specifications of fire resistance class F90. Doors in the set-up room must
be executed as T30 fire safety doors – this also applies for doors between the heating room and the set-up room.
F90:
– 12 cm gypsum plaster, plastered on both sides
– 12 cm clay brick, plastered on both sides
– 17 cm hollow block, plastered on both sides
– 10 cm concrete wall
– Single-plank wall construction with F90 planking
For outdoor setup F90 cladding is not required if the minimum clearances for flashover are maintained (information:
Municipal authorities).
Lights, switches, and power outlets are permitted in the set-up room (no dust concentration ). However lights must
be outside of the fabric tank area.
Fill and vent lines that are routed through adjacent rooms must in this case only satisfy F90 fire requirements if they
are routed through areas that are subject to fire hazard (garages, boiler room, etc.).
9.7.2 Switzerland
The Austrian regulations apply analogously. However instead of F90 only fire resistance class F60 is required.
9.7.3 Germany
For pellet heating systems to 50 kW nominal output the fabric tank can be set up in the same room where the
boiler is set up. However a minimum distance of 1.0 meter between fabric tank and boiler must be maintained. This
minimum distance can also be underranged if a non-flammable heat protection shield is installed between boiler
and fabric tank.
Explain the hazard sources to the customers. Fire safety regulations must be satisfied
prior to commissioning.
9.8 Completion and concluding inspection
Ensure that the extractor nozzle is now located in the centre of the fabric tank .
MA-Easyfire 10.2008_EN.indd 87MA-Easyfire 10.2008_EN.indd 87 30.03.2009 13:30:15 Uhr30.03.2009 13:30:15 Uhr
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