Ventilation & Combustion Air Requirements; Permanent Air Vent - Stanley Cara Installation And Operating Instructions Manual

Direction of wind
Pressure zone
Direction of wind
Pressure zone
Direction of wind
Pressure zone
VENTILATION AND COMBUSTION AIR
REQUIREMENTS
The minimum effective air requirement for this appli-
2
ance is 8.25cm . When calculating combustion air
requirements for this appliance use the following
2
equation: 550mm per each kW of rated output
above 5 kW should be
draught stabiliser is used the total free area shall be
2
increased by 300mm
If there is another appli-ance using air fitted in the
same or adjacent room, it will be necessary to pro-
vide an additional air supply.
All materials used in the manufacture of air vents
should be such that the vent is dimensionally stable,
corrosion resistant, and no provision for closure.
The effective free area of any vent should be ascer-
tained before installation. The effect of any grills
should be allowed for when determining the effective
free area of any vent.
Suction zone
Suction zone
Suction zone
provided, where a flue
for each kW of rated output.
Air vents direct to the outside of the building should
Fig 10
be located so that any air current produced will not
pass through normally occupied areas of the room.
An air vent outside the building should not be locat-
ed less than the dimensions specified within the
Building Regulations and B.S. 8303: Part 1 from any
part of any flue terminal. These air vents must also
be satisfactorily fire proofed as per Building
Regulations and B.S. 8303: Part 1.
Air vents in internal walls should not communicate
with bedrooms, bedsits, toilets, bathrooms or rooms
containing a shower.
Air vents traversing cavity walls should include a
continuous duct across the cavity. The duct should
be installed in such a manner as not to impair the
weather resistance of the cavity.
Joints between air vents and outside walls should be
sealed to prevent the ingress of moisture. Existing
air vents should be of the correct size and unob-
structed for the appliance in use. If there is an
extraction fan fitted in adjacent rooms where this
appliance is fitted, additional air vents may be
required to alleviate the possibility of spillage of
products of combustion from the appliance/flue
while the fan is in operation. Refer to B.S. 8303 Part
1.
Where such an installation exists, a test for spillage
should be made with the fan or fans and other appli-
ances using air in operation at full rate, (i.e.extrac-
tion fans, tumble dryers) with all external doors and
windows closed.
If spillage occurs following the above operation, an
additional air vent of sufficient size to prevent this
occurrence should be installed.
Especially Airtight Properties:-
If the stove is being fitted in a property where the
design air permeability is less than 5m
mally newer properties built from 2006), then a per-
manent ventilation must be fitted to provide 550mm
of ventilation for each kW of rated output.
draught stabiliser is also fitted then the requirement
is 850mm

PERMANENT AIR VENT

The stove requires an adequate air supply in order
for it to operate safely and efficiently. The installer
may have fitted a permanent air supply vent into the
room in which the stove is installed to provide com-
bustion and/or ventilation air. This air vent should
not under any circumstances be shut off or sealed.
7
2
per kW of rated output.
3 2
/ (h.m ) (nor-
2
If a