Operating instructions
21
Installation
outside Air kit:
It is mandatory to use outside air for installations in mobile homes.
A 4” (10.2 cm) fresh air adaptor kit is available. This kit can be installed on 
the back of the Ash Box. If outside air is to be used in conjunction with the 
convection fan kit, there is a separate outside air adapter which connects 
to the bottom of the Ash Box. Refer to the Parts List.
Place  the  ¼”  mesh  screen  behind  the  fresh  air  adaptor  (as  shown  to 
right).
Fresh air connection to the unit must be a non-combustible pipe - 
Example: 4” (10.2 cm) single wall aluminum ex pipe.
reCommended HeigHts And diAmeters For Flue pipe:
The minimum ue pipe height at sea level is 12 feet (3.7 m) straight up from top of the unit. For every 
1000 feet (305 m) above sea level, 4% could be added to the overall height. Use Tables 14, 15, and 16 
to calculate the required vertical rise required.
Elevation 
above sea level
Minimum recommended ue pipe height for # of elbows         
(Note: No more than 2 offsets (4 elbows) can be used. 2x45°=1x90°
feet 0 2 x 15° 4 x 15° 2 x 30° 4 x 30° 2 x 45° 4 x 45°
0-1000 12.0 12.7 13.3 13.3 14.7 14.0 16.0
1000-2000 12.5 13.2 13.8 13.8 15.3 14.6 16.6
2000-3000 13.0 13.7 14.4 14.4 15.9 15.1 17.3
3000-4000 13.4 14.2 14.9 14.9 16.5 15.7 17.9
4000-5000 13.9 14.7 15.4 15.4 17.1 16.2 18.6
5000-6000 14.4 15.2 16.0 16.0 17.6 16.8 19.2
6000-7000 14.9 15.7 16.5 16.5 18.2 17.4 19.8
7000-8000 15.4 16.3 17.0 17.0 18.8 17.9 20.5
8000-9000 15.8 16.8 17.6 17.6 19.4 18.5 21.1
9000-10000 16.3 17.3 18.1 18.1 20.0 19.0 21.8
meters 0 2 x 15° 4 x 15° 2 x 30° 4 x 30° 2 x 45° 4 x 45°
0-305 3.7 3.9 4.1 4.1 4.5 4.3 4.9
305-610 3.8 4.0 4.2 4.2 4.6 4.4 5.1
610-915 4.0 4.2 4.4 4.4 4.8 4.6 5.3
915-1220 4.1 4.3 4.6 4.6 5.0 4.8 5.5
1220-1525 4.2 4.5 4.7 4.7 5.2 4.9 5.7
1525-1830 4.4 4.6 4.9 4.9 5.4 5.1 5.9
1830-2135 4.5 4.8 5.0 5.0 5.5 5.3 6.0
2135-2440 4.7 4.9 5.2 5.2 5.7 5.5 6.2
2440-2745 4.8 5.1 5.4 5.4 5.9 5.6 6.4
2745-3050 5.0 5.3 5.5 5.5 6.1 5.8 6.6
Figure 8: Fresh Air Adaptor
Table 7: Distance to add to 
overall vertical height.
Distance to add
Part used feet meters
45° elbow 1.0 0.3
90° elbow 2.0 0.6
“T” 3.0 0.9
1 ft (0.3m) of 
horizontal run
2.0 0.6
Table 8: Examples of calculating 
overall vertical height required.
Height
sea level with 2 
x 30° elbows 
13.3 ft (4.1 m)
one “T” 3.0 ft (0.9 m)
1½ ft (0.6 m) 
horizontal run
3.0 ft (0.9 m)
Total 1 19.3 ft (5.9 m)
4000-5000 ft 
(1220-1525 m) 
above sea level
13.9 ft (4.2 m)
one “T” 3.0 ft (0.9 m)
2 ft (0.6 m) 
horizontal run
4.0 ft (1.2 m)
Total 2 20.9 ft (6.3 m)
Table 6: Recommended Height for Flue Pipe.
We recommend  the  use  of  a  6”  (150mm)  diameter  ue  pipe.  However,  the  CSA-B365 and  the  WETT 
Training Manual state that the ue pipe may be reduced in cross-sectional area provided that the installer 
ensures sufcient draft is available at the appliance.
Rear of Ash Box










