17
Page
-Exhaust vent (Stainless steel vent)-
This is a Category IV appliance and must be vented accordingly.
The vent system must be sealed
airtig
ht.
All seams and joints
without gaskets
must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature ra
ting of 160 °
F. For best results, a vent system
should be as short and straight as possible.
•
The micro-boiler is
a
Category
IV
appliance
and
must
be
vented
accordingly
with
any
4”
vent
approved
f
or use with Category III/IV or Special BH type gas vent.
•
The manufacturer recommends the NovaVent line
. However, the
f
ollowing are also UL listed
manu
f
acturers: ProTech Systems Inc. (FasNSeal), Metal-Fab Inc., and Heat-Fab Inc. (Sa
f
-T Vent).
•
Follow the vent pipe manufacturer’s ins
tructions
when installing the vent pipe.
•
The maximum length
of
exhaust vent piping must not exceed
100
ft. (30.5
m)
(deducting
5
ft.
(1.5
m)
f
or each elbow used in the ven
ting
system). Do not use more than
5
elbows.
•
When the horizontal vent run exceeds
5
ft.
(1.5
m), support the vent run at 3
ft.
(0.9
m) intervals
with overhead hangers.
Diameter
Max. No. of Elbows Max. V
erti
cal and Horizontal (Total) Vent Length
4 in.
(102
mm)
5
100
ft.
(30.5
m )
*For each elbow added, deduct 5
ft.
(1.5 m) from max. vent length.
No. of Elbows
Max. V
erti
cal or Horizontal Vent Length
0
100
ft.
(30.5
m)
1
95
ft.
(29.0
m)
2
90
ft.
(27.4
m)
5
75
ft.
(22.9
m)
Excludes vent terminators, termina
tion
elbows, or rain caps.
