Direct Vent Operation; Connection Of Multiple Devices In Direct Vent Operation; Combustion Air Connection; Chimney Connection - HASE LIMAiQ Mode D'emploi

Simultaneously operating stoves with ventilation systems and/or
extractor hoods can cause negative pressure in the room the stove is
installed in and cause problems such as flue gas escaping the stove.
The negative pressure in the installation room must not exceed 4 Pa with
indirect vent operation.

5.7 Direct vent operation

INFO: DIRECT VENT OPERATION
During direct vent operation of the stove, the combustion air is drawn from
outside into the firebox through an air duct. Direct vent operation combined
with continuous duty air extraction system requires a so-called direct vent
stove with the following special features:
▪ High, guaranteed tightness.
▪ Automatic sealing firebox door.
▪ Central combustion air connection.
Requirements for direct vent operation:
▪ The negative pressure in the installation room must not exceed 8 Pa.
▪ Simultaneously operating systems which draw air from the installation
room (controlled ventilation), the negative pressure may be max. 8 Pa
compared to outside.
▪ Combustion air connection to the via a tight combustion air
channel.
▪ Flue pipe connection: see chapter "5.5 Flue pipe connection".

5.7.1 Connection of multiple devices in direct vent operation

Direct vent operation of your stove, the following requirements must be met
when multiple devices are connected to the chimney:
▪ Connection of multiple devices is permissible under
current relevant national and regional regulations.
▪ All connected fireplace stoves must be located in the same
unit (residence, office, practices or businesses) or
in the same effective area of the ventilation system.
▪ The inlets for the combustion air ducts have the
same pressure ratios. Wind-related pressure fluctuations
must be avoided.
▪ When connecting to a LAS (air/flue gas solid fuel) chimney, this must
be approved for connecting multiple fireplace stoves for solid fuels.
CAUTION: DAMPER INSTALLATION
Installing a damper is prohibited for direct vent operation due to the required
tightness.
To view and print the building inspectorate approval for direct vent operation,
please visit www.hase.de.

5.8 Combustion air connection

The firebox is solely supplied with combustion air via an on-site air inlet pipe
and the pipe connections of the HASE air system.
The fitting for the HASE air system is located on the bottom of the
stove. The HASE air system can be connected at the bottom or at the back.
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The sealed pipe connections connect directly to the outside or a
suitable air/flue gas system (LAS).
The supply air can also be drawn from a room directly vented with outside air
(e.g. cellar).
INFO: AIR SUPPLY DUCTS
The on-site air supply duct must be sufficiently tight and meet the
requirements of DIN EN 12237 and DIN EN 13180, Tightness class C-D:
► The air supply duct has a minimum diameter of 100 mm
and max. two 90° elbows.
► The max. total length is 4.5 m.
► Longer lengths and more than two elbows requires
computational proof.
► The combustion air requirement must be met
(see chapter "12.2 Technical data").
► A suitable service access must be installed to inspect and clean
the air supply duct.
► The entire air supply duct must be airtight and insulated
against condensation using water-repellent insulation.
► Please consult your authorised dealer.
► The air inlet cross section at the air inlet must correspond
with the pipe cross section.
► When installing a small animal grate, the mesh size must be
at least 10 mm.

5.9 Chimney connection

NOTE: SUPPLY PRESSURE (CHIMNEY AIRFLOW)
The supply pressure level greatly influences the combustion behaviour of the
fireplace stove.
Supply pressures higher than specified increase the emissions of the
fireplace stove. This puts a heavy load on the fireplace stove and can
damage your stove:
► Observe the max. supply pressure of 25 Pa.

5.10 Combustion air

The combustion air is regulated by the iQ controller.
NOTE: REAR WALL AIR OPENINGS
The rear wall air openings ensure the stove has the required amount of
oxygen:
► Never seal the rear wall air openings.
The grate air is primarily supplied during the lighting stage, it accelerates
over-igniting the fuel.
The window air purge is the primary oxygen supply for the flame and ember
area and reduces soot built-up on the firebox glass.
The rear wall air supplies the flame area in the upper area of the firebox if
combustion air is lacking here.

5.11 Installing the air system and cladding

INFO: INSTALLATION
How to install the cladding (soapstone/ceramic) and the air system is
described in the model-specific installation instructions:
► Observe the installation instructions.
► Consult a professional for installation.