2 Owner manual

Installation & Operation Manual
4 Vertical venting (continued)
21
Figure 4-5_DirectAire Vertical with Sidewall Venting
Sidewall air inlet
The sidewall air inlet cap kit is supplied as one of the
DirectAire Vent kits which must be ordered from the
manufacturer. This sidewall cap will supply combustion air
for a single pool heater only.
Figure 4-6_Air Inlet Cap for Sidewall Termination
Locate units as close as possible to the sidewall where the
combustion air supply system will be installed.
To prevent recirculation of the 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 manual.
The combustion air inlet cap must be installed at least
one foot above ground level and above normal snow levels.
Figure 4-7_DirectAire Vertical Installation with
Rooftop Combustion Air
Vertical rooftop air inlet
The air inlet arrangement as shown in FIG. 4-7 is fabricated
using commercially available elbows (field supplied) with the
same diameter as the air inlet pipe.
The combustion air inlet opening must be at least 3 feet below
the point of flue gas termination (vent cap) if it is located within
10 feet horizontally of the flue outlet.
The combustion air inlet opening must not be located closer
than 10 feet from an inside corner of an L-shaped structure.
The combustion air inlet opening must be located at least one
foot above the rooftop and above normal snow levels.