Enviro EG28-120 - Manual (Page 20)

Figure 23: Vent restrictor ring.
Figure 22. Possible Vent Configurations; Vertical
and Horizontal Terminations.
V
ENT
C
ONFIGURATIONS
:
Figures 22 shows the range of venting options, it
shows possible vent configurations if the unit is top
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.
NOTE: The total length of the vent pipes can not
exceed 33 feet (10.1 m). Any combination of rise and
run can be used as long as it lays within the shaded
area (a total of three (3) 90° elbows or six (6) 45°
elbows can be used). In addition to what is shown, if a
90° elbow is used in the horizontal plane, 3 feet (91.4
cm) must be subtracted from the allowable horizontal
run (for each 45° elbow, 11⁄2 feet must be subtracted
from the allowable horizontal run).
V
ENT
R
ESTRICTOR
R
ING
:
A vent restrictor ring is supplied with each direct vent fireplace.
This restrictor ring is to be installed when the vertical chimney
installation is over 15 feet (4.57 m). Before the chimney is
placed onto the stove, place this vent restrictor ring into the 4
inch (10.2 cm) flue pipe (as shown), once the vent restrictor
ring has been installed, the vertical sections of chimney can be
installed.
V
ENT
C
ONFIGURATIONS
:
Initial Installation
QUALIFIED INSTALLERS ONLY
20