Specifications

DV - 520

VERTICAL FLEXIBLE VENTING

1) With the fireplace in position, plumb the location in the ceiling and the roof for the vent.

2) Cut a 9 3/8” square hole in the ceiling. Frame around the opening. The 9 3/8” size opening ensures

the required 1” clearance is maintained to the outer flexible vent pipe.

Note: If the area above the ceiling is not an attic, a fire-stop should be installed top and bottom of the

opening (with the spacer tabs pointing into the opening) this also ensures the required 1” clearance is

maintained to the outer flexible vent pipe.

3) Nail each fire stop in place securely into the framing.

Note: additional fire stops are available for installations requiring them.

4) The vertical vent must extend a minimum of 2 feet above the highest point were it passes through

the roof or above any portion of a building within 10 feet of it.

Note: The 7” diameter outer flex pipe is not permitted to extend through the roof. The 7” diameter rigid

outer pipe must be used and must pass though the roof to allow the installation of the roof support.

Note: The 4” diameter inner flex pipe must remain in one continuous piece from the unit to the termina-

tion cap. It cannot be joined.

5) Install the roof support with at least 4 fasteners and fasten the 7” diameter rigid pipe to it using the

screws provided. Ensure the 1” required clearance to the outer pipe is maintained as it passes through

the roof.

Note: Additional lengths of 7” diameter rigid pipe are available for installations requiring them.

6) Determine the length of flexible venting required 4” diameter inner and 7” diameter outer pipe and

stretch these out to fit. Now install the spring spacers (every 3 feet) onto the inner pipe. Finally fit the 7”

diameter flexible outer pipe over the inner pipe.

7) Put the vent assembly in place.

8) Connect the 4” diameter inner flex to the collar on the termination cap seal with a bead of “Mil

Pac” (1/4” wide) and securing with a minimum of 3 screws evenly around the pipe. Repeat the proce-

dure for the 7” diameter outer flex to the collar on the termination cap. Then finally at the fireplace col-

lars.

Note: Ensure all joints are air-tight and rigidly connected.