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Section 2: Power vents
Installing the Power Vent Termination
•
Frame the chase for the Power Vent Termination to the
dimensions shown in the power vent section.
•
Secure the termination and its frame using appropriately rated
fasteners.
ALLOWABLE EXHAUST VENT RUNS
MIN VENT RUN
MAX VENT RUN
80' (Including 7
3'
ALLOWABLE EXHAUST DOWNWARD VENT RUN
FOR EVERY 1' IN DOWNWARD VENT, DEDUCT 5' FROM TOTAL
ALLOWABLE VENT RUN (MAX. OF 8' TOTAL DOWNWARD)
ALLOWABLE INTAKE VENT RUNS (B OR C VENT)
MIN VENT RUN
MAX VENT RUN
40' (Including 3
3'
•
If more than 7 elbows are required, the maximum allowable
vent run must be decreased by 20' for each additional elbow.
For example, a vent run with 9x 90° elbows has a maximum
vent run distance of 40 feet.
•
Should your vent run fall outside of the parameters shown,
please contact a Montigo representative to discuss other options.
Roof or Wall Mount Power Vent
Installation
•
Prodigy series fireplaces are certified for use with any UL listed
type B venting components (B-Vent required for flue gas only).
Use of other non certified parts will void the Montigo warranty,
and may impede the operation of the fireplace.
• The vent run should not exceed distances described in allowable
exhaust table. If your vent run does not meet these requirements
please contact your local Montigo representative.
•
Install components and fittings using the clearances specified
by the B-Vent manufacturer.
•
All joints must be secured as per the instructions provided by
the B-Vent manufacturer.
• The exhaust portion of a vent termination must not be recessed
in a wall cavity.
•
Horizontal runs must be supported by a minimum of three
supports per 10 feet of venting.
•
It is important that the location of the power vent motor is not
exposed to a downfall of water in excess of the standard rain fall.
•
Before installing the termination or venting, check to ensure
the planned termination location is acceptable.
8
ELBOWS
7 @ 90°
elbows)
ELBOWS
3 @ 90°
elbows)
Combined
combustion air ducts
Combining combustion air
ducts is sometimes required
to facilitate field installation of
the Prodigy models.
This is easily done when the
same equivalent free air area
is maintained or exceeded.
For example find the
equivalent single air duct
required for two 8" intake.
This requires 50.3 inches per
8" round an equivalent single
duct would require 100.6
square inches of free air area.
The equivalent round duct for
this would be 12" diameter.
A transitional plenum or wye could be used above the unit and
the two single 8" ducts can run from the plenum/wye to the top
of the unit and the vent to the outside in 12" diameter duct.
Inline Power Vent Installation
Installation from fireplace to PV (negative pressure system)
•
Prodigy series fireplaces are certified for use with any approved
UL certified type B venting components. Use of other non-
certified parts will void the Montigo warranty, and may impede
the operation of the fireplace.
• The vent run should not exceed distances described in Table. If
your vent run does not meet these requirements please contact
your local Montigo representative.
•
Install components and fittings using the clearances specified
by the B-Vent manufacturer.
•
All joints must be secured as per the instructions provided by
the B-Vent manufacturer.
•
Horizontal runs must be supported by a minimum of three
supports per 10 feet of venting.
•
Select a location for the power vent that will permit an access
panel for future maintenance work.
•
Ensure access panel is large enough for the motor to be accessed
in case it ever must be removed.
• The power vent can be mounted to any solid non-combustible
surface.
•
Anchoring bolts for the power vent should be rated for a
minimum of 300 lbs each and be 1/4" diameter minimum.
•
If suspending the power vent, some bracing mechanism should
be designed to prevent any lateral movement of the equipment.
Installation from the PV to building exterior (positive pressure):
•
Beyond the inline power vent, venting must be positive pressure
rated with all joints sealed.
•
For runs up to 30', use Montigo VPIF piping. For runs over 30'
use a UL listed sealed venting system.
• The exhaust portion of a vent termination must not be recessed
in a wall cavity.
•
Horizontal runs must be supported by a minimum of three
supports per 10 feet of venting.
• The flue gas outlet should be a louver box or termination that
has equivalent free air in square inches as that of the flue collar
•
Clearance to combustibles around Montigo VPIF vent is 1".
General
COMMON
AREA
COLLAR SIZES
(IN SQ)
(IN DIAMETER)
4
12.6
5
19.6
6
28.3
8
50.3
10
78.5
12
113.1
14
153.9
16
201.1
XG0799 - 081319
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