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Combined Air Inlet Points
The air inlet pipes from multiple ap pli anc es installed with an
Intelli-Vent system can be combined to a single common connection
based on the cross sectional area of the common pipe as defined in the
Direct Vent basic in for ma tion section.
Maximum Length of an Intelli-Vent Sys tem
The maximum installed length of the air inlet pipe from the
appliance to the air inlet cap is 100 equivalent feet (30.5 m) in
length. The maximum in stalled length of the flue pipe from the
appliance to the termination cap is 100 equivalent feet (30.5 m)
in length. Subtract 5 feet (1.52 m) of equivalent length for each
90° elbow installed in either the flue pipe or the air inlet pipe.
Subtract 2 1/2 feet (0.7 m) of equivalent length for each 45° elbow
installed in either the flue pipe or the air inlet pipe.
VERTICAL INTELLI-VENT WITH
SIDEWALL COMBUSTION AIR
FIG. 27 Vertical Intelli-Vent Installation - Sidewall Combustion
Air Inlet
Intelli-Vent systems are installed with a Category IV flue and a
separate combustion air pipe to the outdoors. The Vertical
Intelli-Vent system ter mi nates the flue at the rooftop and air inlet
at the sidewall. The flue outlet and combustion air intake terminates
in different pressure zones.
Follow all requirements in the General Category IV Venting
sections for proper installation and venting of flue prod ucts
vertically to the outdoors. All other general installation
requirements must be followed.
The Intelli-Vent system requires the installation of an additional
pipe to supply combustion air from outdoors directly to the
appliance.
Termination point for the flue products must follow the clearance
requirements in the Vertical Vent Termination sec tion of the
Category IV Venting.
CAUTIONƽ
Appliances that are shut down or will not operate may
experience freezing due to convective airflow in the air inlet
pipe connected to the appliance.
SIDEWALL COMBUSTION
AIR INLET
FIG. 28 Air Inlet Cap for Sidewall Termination
The air inlet cap for the sidewall air inlet must be purchased from
the ap pli ance manufacturer.
The part numbers for the required sidewall air inlet cap kit are listed
by unit size. The appliance man u fac tur er, in accordance with CSA
requirements, must furnish the sidewall air inlet cap. Each kit
includes the special combustion air inlet cap for installation on an
exterior sidewall.
TABLE - H
Air Inlet Sidewall
Input Flue Pipe Air Inlet
Btu/hr Size Size Cap Kit
1,500,000
___________
1,700,000
___________
2,000,000
6"
___________
7"
___________
8"
6"
___________
7"*
___________
8"
SAK3000
___________
SAK3001
___________
SAK3002
*Piping from the appliance to the air inlet cap may be either 7" or
8" connecting to an 8" sidewall cap provided in the kit.