Page 16 Reznor, PVE, Installation Manual EN 2019-11, D301113 iss D
The high level ventilation opening should be
sited on an external wall and positioned as
high as is practical and always within the top
15% of the wall height
The low level natural ventilation opening
should be situated on an external wall and
be within 1000 mm of floor level for natural
gas and ideally at floor level for L.P.G gas
installations but in any event no higher than
250 mm.
Model
High cm
2
Low cm
2
30
160
320
50
267
533
72
394
788
95
527
1053
120
656
1312
145
787
1574
Table 12: Minimum Free Area of Natural
Ventilation Openings to enclosures for flued
heaters
Flue requirements
IMPORTANT :
The flue must be installed in
accordance with national and
local regulations. Failure to provide proper
flueing could result in death, serious
injury and/or property damage. The air
heater must be installed with a flue to the
outside of the building. Safe operation of
any power vented gas apparatus requires
a properly operating flue system, correct
provision for combustion air and regular
maintenance and inspection.
PVE heaters may be installed as Type-B and
Type-C installations.
Flue must be in accordance with codes
of practice and relevant standards. Local
requirements may apply in addition to national
requirements. These unit heaters are designed
to operate safely and efficiently with either
a horizontal or vertical flue system when
installed with the specific requirements and
instructions
If this heater is replacing an existing heater,
be sure that the flue is sized properly for the
heater being installed and that the existing
flue is in good condition. A properly sized flue
system is required for safe operation of the
heater.
An improperly sized flue system can cause
unsafe conditions and/or create condensation.
The air heaters may be installed as a
balanced flue (type C) heater requiring both
a combustion air inlet duct and a flue pipe
or as a power vented heater (type B) (the
combustion air is taken from the space where
heater is installed), which requires only a flue
pipe exhausting to outdoors.
All products of combustion must be flued to
outdoor atmosphere
Each heater installed as a type B appliance
must be fitted with an individual flue pipe and
the combustion air inlet opening is provided
with a protection grill. Each heater installed
as a type C appliance must be fitted with an
individual combustion air/ flue pipe system.
Type C2 appliances with single-duct system for
supply of combustion air and evacuation of
flue gasses are not allowed.
Flue pipe diameters and maximum pipe
lengths in Table 12 apply to both horizontal
and vertical systems. Add all straight sections
and equivalent lengths for elbow.
The total combined length must not exceed
the maximum flue length.
