Owner`s manual

22
Figure 24. Possible Vent Congurations for
Top and Rear Vented; Vertical and Horizontal
Terminations
Initial Installation
QUALIFIED INSTALLERS ONLY
aLLowabLe co-axiaL Vent configuRations:
Figures 24 shows the range of venting options, it shows possible vent congurations if the unit is top or
rear vented, for vertical and horizontal terminations, any layout that remains within the shaded area is
acceptable. Having the fewest number of elbows is ideal, as they tend to disrupt air movement. Using
45˚ elbows is preferable to using 90˚ elbows. Also, a shorter vent system will perform better than a
longer one. The total length of horizontal vent pipe can not exceed 20 feet (6.1m) and the total vent
length can not exceed 40ft (12.2m). Any
combination of rise and run can be used
as long as it lays within the shaded area
(a total of two (2) 90˚ elbows or four (4)
45˚ elbows can be used. In addition to
what is shown, if a 90˚ elbow is used
in the horizontal plane, 3 feet (91.4cm)
must be subtracted from the allowable
horizontal run (for each 45˚ elbow, 1½
feet must be subtracted).
0’
(0m)
5’
(1.52m)
0’
(0m)
5’
(1.52m)
10’
(3.05m)
10’
(3.05m)
15’
(4.57m)
15’
(1.52m)
20’
(6.1m)
20’
(6.1m)
25’
(7.62m)
30’
(9.14m)
35’
(10.7m)
40’
(12.2m)
Vent
Position