24
Figure 19.
Fresh Air Intake Spigot
See section 7.2 for recommendations on duct length.
Air duct should be as straight as possible. Do not use
bends in excess of 45°. Consult the manufacturer if
more than 2 x 45° offset bends are necessary. The
fresh air duct must be self supporting.
7
7..6
6
A
AIIR
R S
SU
UP
PP
PL
LY
Y R
RE
EQ
QU
UIIR
RE
EM
ME
EN
NT
TS
S
When fresh air duct is used, follow one of these rules:
A. The flue must penetrate the roof while the fresh
air can penetrate any wall.
B. The flue and fresh air supply must penetrate the
same roof, at a minimum of one meter apart.
C. The flue must penetrate one meter higher than
the fresh air inlet on the same wall.
Figure 20.
Air Supply with Flue Configurations
7
7..7
7
C
CO
OM
MM
MO
ON
N D
DU
UC
CT
T
When using a common air inlet duct, always ensure
that the area of the common air inlet duct exceeds
the total area of all air ducts by 20%.
100 mm diameter
Fresh Air Intake Spigot
Dust Arrest
Baffle Plate
Burner
Inlet
Flue
Inlet
Flue
Min. 1 m
Inlet
Flue
Min. 1 m
Roof
Wall
A
C
B
