The sidewall or vertical roof top
E+Vent
combustion air supply system has specific vent
material and installation requirements.
The air inlet pipe connects directly to the boiler
to supply combustion air. In most installations,
the combustion air inlet pipe will be a
dedicated system with one air inlet pipe per
boiler. Multiple air inlets may be combined if
the guidelines in “Combined Air Inlet Points”
are followed. The air inlet pipe will be
connected to a combustion air inlet cap as
specified in this section. Combustion air
supplied from outdoors should be free of
contaminants. The air inlet pipe(s) must be
sealed. Select air inlet pipe material from the
following specified materials:
• PVC, CPVC or ABS (4
”
, 5
”
or 6
”
I.D.).
• Dryer vent (not recommended for roof
top air inlet)
• Galvanized steel vent pipe with joints
and seams sealed.
• Type “B” double wall vent with joints
and seams sealed.
The total equivalent length of the sidewall or
vertical roof top
E+Vent
combustion air inlet pipe
shall not exceed a maximum of 50 equivalent
feet (15.2m) in length. Subtract 5 feet (1.5m) for
each elbow in the air intake system.
Sidewall Air Inlet
The sidewall air inlet cap is supplied in the E+
Sidewall Vent Kit. Each kit includes a sidewall
combustion air inlet cap to supply air to a single
boiler and instructions for proper installation. The
part number for each kit is listed by unit size.
Locate units as close as possible to the sidewall
where the combustion air supply system will be
installed.
To prevent recirculation of flue products from an
adjacent vent cap into the combustion air inlet,
follow all applicable clearance requirements in
the latest edition of the
National Fuel Gas Code
and instructions in this guide.
The combustion air inlet cap
must
be placed at
least one foot (0.3m) above ground level and
above normal snow levels.
NOTE:
The use of double wall
vent material for the
combustion air inlet pipe
is recommended in cold
climates to prevent the
accumulation of
condensation on the
pipe exterior.
(FIG. 8) E+ VENT WITH SIDEWALL AIR INLET
(TABLE C)
E+ VENT SIDEWALL AIR KIT PART NUMBERS
MODE CONVENTIONAL VENT AIR
SIDEWALL
NUMBER
FLUE SIZE*
INLET PIPE** E+ VENT KIT
EB150
5”
4”
SVK 3020
EB200
5”
4”
SVK 3020
EB250
6”
5”
SVK 3021
EB300
6”
5”
SVK 3021
*Vent size with 1” increaser installed for conventional negative
draft venting.
L o c h i n v a r
D E S I G N E R
’
S
G U I D E
E F F I C I E N C Y
+
B O I L E R
6 1 5 - 8 8 9 - 8 9 0 0
9
(FIG. 9) E+ VENT WITH VERTICAL AIR INLET
