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Varde Uniq Manual

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Installation Instructions
3. Ventilation
3.1 Many older buildings are sufficiently ventilated by natural
leakage of air to provide suitable air supply for an appliance
of 5kW output or less.
Modern building techniques have reduced the amount of air
that leaks in or out of a house. A modern construction with
an air tightness of less than 5m3 per hour per m2 requires
an air vent for ALL solid fuel appliances including those with
a rated heat output of less than 5kW.
NOTE: The air leakage of a modern house is tested at
the completion of construction and a certificate issued
confirming this.
3.2 This appliance requires a constant supply of air to maintain
proper combustion and effective flue performance.
3.3 An inadequate air supply can result in poor combustion and
smoke entering the room which is potentially dangerous.
3.4 This supply of air can come from either:
— The natural leakage of air into the room in which the
product is fitted.
— Purpose provided ventilation, see chart below for
specifications.
— Some appliances can also be fitted with an optional
outdoor air kit which allows air to be drawn in from the
outside.
3.5 The amount of air required must comply with local building
regulations and the rules in force.
3.6 If spillage is detected during commissioning then there may
be insufficient natural ventilation and an additional air supply
will be necessary.
VENTILATION
A) Traditionally Built Homes
•Whereleakageisgreaterthan5m3/hour/m2.
•Ventilationnormallyrequired=550mm2 per kW output over 5kW
B) Modern Construction Homes
•Whereleakageislessthan5m3/hour/m2.
•Ventilationnormallyrequired=550mm2 per kW
Stove output rating kW 5 6 7 8 9 10 11 12 13 14
AAdditional Ventilation
mm2None 550 1100 1650 2200 2750 3300 3850 4400 4950
cm2None 5.5 11 16.5 22 27.5 33 38.5 44 49.5
in2None 0.9 1.8 2.6 3.6 4.4 5.3 6.2 7.1 8
BAdditional Ventilation
mm22750 3300 3850 4400 4950 5500 6050 6600 7150 7700
cm227.5 335.3 38.5 44 49.5 55 60.5 66 71.5 77
in24.4 6.2 6.2 7.1 8 9 10 10.7 11.5 12.4
Ventilation requirements in the UK are as shown in the table below:
3.7 Permanent air vents should be non-adjustable and
positioned where they are unlikely to be become blocked.
3.8 If vents open into adjoining rooms or spaces there must be
an air vent of at least the same size direct to the outside.
3.9 Site the vents where cold draught is unlikely to cause
discomfort. This can be avoided by placing vents near
ceilings or close to the appliance (See diagram).
3.10 Extractor fans or cooker hoods must not be placed in the
same room or space as this can cause the appliance to emit
fumes into the room.
3.11 Increase air supply provisions where a room contains
multiple appliances.
3.12 If any checks reveal problems do not proceed with the
fitting of the appliance until they have been rectified.
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