Instructions for sucking off the gas products of combustion
Type A devices (see the label with characteristics). Appliance of nish A, that is the appliance which is not
made for being connected with the chimney or other device for sucking off the products of combustion out
of the space where the appliance is situated. These appliances must be situated in the room with suf cient
ventilation according to the ČSN 12 7010:1986 and ČSN 1207040:1986. It is necessary to prevent the
accumulation of the harmful matters in big concentration (secure the requirement of hygienic standard for
working surrounding sv. 39/78 guideline 46).
Outlet hood with natural extraction (A). Flue gas provides a natural chimney draft.
Outlet hood without natural extraction. Flue gas is secured by a fan (D) (forced extraction). In this
case, it is necessary to secure the connection with a gas feeder (B) to turn off the gas supply in case
of failure.
NATURAL EXTRACTION FORCED EXTRACTION
CHIMNEY DESIGN FOR AN APPLIANCE –TYPE A
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