
5.12
Air supply from the outside wall and a roof outlet
with common discharge system
Appliance category: C83
An air supply from the outside wall and a roof outlet with common
discharge system is allowed.
CAUTION
The air supply (A) in the outside wall must be provided
with an Atmos inlet grid.
The flue discharge (B) must be provided with a pulling
discharge cover.
The minimum bore of the common discharge system
Diameter for InterCombi
Number of
appliances
HE 32
2 130
3 150
4 180
5 200
6 220
7 230
8 250
9 270
10 280
11 290
12 300
Maximum pipe length
The maximum length of the air supply and flue discharge pipes
between appliance and common flue discharge and air supply
together is 75 metres.
Flue discharge pipe and air supply pipe
For mounting, see § 5.6.5.
Common flue discharge
The outlet of the flue discharge can be made at any place in the pitching
roof surface, provided that the outlet in the roof surface has the same
orientation as the air supply in the outside wall. With a flat roof the outlet
of the flue discharge must be made in the 'free' outlet area.
Apply a condensate discharge.
CAUTION
The common discharge system must be provided with a
pulling discharge cover.
When the common discharge system is located in the
outside air, the discharge pipe must be double-walled or
insulated.
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