Prestige Solo 399 Concentric Vent System Supplement

4
3. Maintain the following clearances to the termi-
nation
:
a. At least 3 feet from adjacent walls
b. No closer than 3 feet below roof overhangs
c. At least 7 feet above any public walkways
d. At least 3 feet above any forced air intake
(does not include the combustion air inlet)
within 10 feet.
e. The termination must be at least 4 feet from
any electric meters, gas meters, gas meter-
regulators, relief valves or other equipment.
Never terminate above or below any of
these items within 4 feet horizontally.
f. Must maintain 12-inch clearances below
and horizontally from doors and windows.
g. Air intake must terminate at least 12 inches
above grade or anticipated snow line as
shown in Fig. 5, page 5.
h. Termination must not extend more than
9-1/2 inches beyond the exterior wall as
shown in Fig. 5, page 5.
Vent/Air System Installation
SECTION II - Vent/Air System
Installation
Vent/Air System Clearance Requirements
The vent/air system may maintain zero clearance to
combustible & non-combustible materials.
Determine Termination Location
1. The maximum equivalent length of the concen-
tric vent/air system should not exceed 100Ft
(excluding the termination). For each 90º elbow
in the system, the equivalent length is reduced
by 10 feet. For each 45º elbow in the system, the
equivalent length is reduced by 5 feet.
2. The installer must consider the following
when determining the location of the vent/air
system termination:
a. Locate the termination where flue vapors
will not damage surrounding shrubs, plants
or air conditioning equipment or be objec-
tionable to the homeowner.
b. The flue products will form a noticeable
plume as they condense in colder air. Avoid
terminating in areas where the plume could
obstruct window views.
c. Prevailing winds could cause freezing of
flue condensation and a buildup of water/ice
on surrounding plants, building surfaces or
combustion air inlet.
d. Avoid locations of possible accidental con-
tact of flue vapors with persons or pets.
e. Avoid locations where prevailing winds
could affect the performance of the unit or
cause recirculation of the flue gases, such as
inside corners of buildings or near adjacent
buildings or vertical surfaces, window
wells, stairwells, alcoves, courtyards, or
other recessed areas.
f. Do not terminate above any doors or win-
dows; flue condensate could freeze causing
ice formations.
g. Locate or guard the termination to prevent
possible condensate damage to exterior
finishes.
Fig. 4: Termination Clearances of Direct
Vent Systems