VERTICAL VENT INSTALLATION
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An Attic Insulation Shield must
be installed where the vent
passes from a lower living space
into an attic space where the
chimney is not enclosed. It is
designed to keep insulation
materials away from the
chimney.
When installing the Attic
Insulation Shield where the
chimney passes from a living
space to an attic space, install
the shield from below and nail it in place using 1" spiral nails.
A firestop must be installed on the bottom side of the joists when passing through a ceiling or floor. If an attic
insulation shield is to be used, a firestop is not required.
One pair (two) 45° elbows may be used to provide an offset in order to avoid cutting of joists and to clear other
obstructions.
When using 45° elbows, an elbow support is required directly above the highest elbow.
When installing a bend in a joist area a minimum of 4” clearance to combustible to the top of bend must be maintained,
sides and bottom of pipe, a 1” clearance to combustibles must be maintained. If running horizontally through an area,
a 2 1/2” clearance to the top of the horizontal pipe must be maintained.
Maximum vertical height of system should not exceed 40 feet.
Spacer springs to be installed on 4" flex pipe every 3 ft. on vertical runs. On 45° elbows or 90° elbows a
spacer spring is needed on the start of the bend and on the end of bend.
OPTIONAL
ADJUSTABLE CLAMP
SELF TAPPING SCREWS
SELF TAPPING SCREWS
TO SECURE RIGID PIPE TO
TERMINATION
NOTE: You may be required to connect 2 lengths of flex pipe together to achieve the
desired length.
The parts are listed below:
ZDV4FC Flex Connector 4” diameter (needed to join 4” flex together) and (4) screws.
Vertical Venting in Cold Climates
In cold climate conditions where temperatures go below -10 degrees Celsius or 14 degrees Fahrenheit, we recommend that the chase be insulated
and where the vent pipe enters into the attic space that the pipe be wrapped with an insulated mylar sleeve. This will increase the temperature of
the vent and help the appliance to vent properly in cold weather conditions.
It is also important in vertical vented direct vent appliances that the appliance be operated daily during the winter months as this will help stop the
Termination from freezing up. We recommend using a thermostat set at room temperature to allow the unit to cycle.
