Quadra-Fire QV36DC-A, Owner'S Manual

Quadra-Fire  •  QV36DC-A  •  2161-900 Rev. B  •  10/08

26

For Vertical Terminations -

 To locate the vent and install 

the vent sections:

•  Locate and mark the vent centerpoint on the underside 

of the roof, and drive a nail through the centerpoint.

•  Make the outline of the roof hole around the centerpoint 

nail.

•  The size of the roof hole framing dimensions depend on 

the pitch of the roof. There 

MUST BE

 a 1-inch (25.4mm) 

clearance from the vertical vent pipe to combustible 
materials.

•  Mark the roof hole accordingly.

•  Cover the opening of the installed vent pipes.

•  Cut and frame the roof hole.

•  Use framing lumber the same size as the roof rafters 

and install the frame securely. Flashing anchored to the 
frame must withstand heavy winds.

•  Continue to install concentric vent sections up through 

the roof hole (for inside vent installations) or up past the 
roof line until you reach the appropriate distance above 
the roof (for outside terminations).

WARNING:  MAJOR U.S. BUILDING CODES 
SPECIFY MINIMUM CHIMNEY AND/OR 
VENT HEIGHT ABOVE THE ROOF TOP. 

THESE MINIMUM HEIGHTS ARE NECESSARY IN 
THE INTEREST OF SAFETY. SEE FIGURE 30 FOR 
MINIMUM HEIGHTS, PROVIDED THE TERMINA-
TION CAP IS AT LEAST TWENTY INCHES FROM 
A VERTICAL WALL AND 2-FEET BELOW A HORI-
ZONTAL OVERHANG.

NOTE: This also pertains to vertical vent systems 
installed on the outside of the building.

!

Roof Pitch 

H (min.) ft.

fl at to 6/12 

1.0

 6/12 to 7/12 

1.25

 over 7/12 to 8/12 

1.5

 over 8/12 to 9/12 

2.0

 over 9/12 to 10/12 

2.5

 over 10/12 to 11/12 

3.25

 over 11/12 to 12/12 

4.0

 over 12/12 to 14/12 

5.0

 over 14/12 to 16/12 

6.0

 over 16/12 to 18/12 

7.0

 over 18/12 to 20/12 

7.5

 over 20/12 to 21/12 

8.0

Figure 30.   Minimum Height from Roof to 
                   Lowest Discharge Opening

To seal the roof hole, and to divert rain and snow from the 
vent system:

• Attach a fl ashing to the roof using nails, and use a non-

hardening mastic around the edges of the fl ashing base 
where it meets the roof.

•  Attach a storm collar over the fl ashing joint to form a 

water-tight seal. Place non-hardening mastic around the 
joint, between the storm collar and the vertical pipe.

•  Slide the termination cap over the end of the vent pipe 

and snap into place.

HORIZONTAL

OVERHANG

VERTICAL

WALL

TERMINATION

CAP

12

X

ROOF PITCH

IS  X/ 12

LOWEST

DISCHARGE

OPENING

H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING

2 FT.

MIN.

20 INCH MIN.