Desa VM42P(B,H) User Manual

108795-01V

10

Maintain

Listed

Clearance

Maintain

Listed

Clearance

12' Min.

12' Min.

45°

45°

6'

8'

12' Min.

60°

45°

Position

Firestop

Position

Firestop

Position

Firestop

Listed

Vent Cap

Listed

Vent Cap

Listed

Vent Cap

Maintain

Listed

Clearance

Maintain

Listed

Clearance

Maintain

Listed

Clearance

Maintain

Listed

Clearance

Support Each

Lateral At

Least Every

6 Feet

Maintain

Listed

Clearance

10'

EXAMPLE 3

EXAMPLE 2

EXAMPLE 1

Some codes areas allow the use of existing 
B-type  vent  systems  if  the  system  is  at  or 
above the recommended diameter of the flue, 
in this case 6".
The  flue  connection  must  be  made  using 
listed  B-type  connectors  and  the  existing 
system must be code inspected for damage 
and proper installation.
It is not recommended that this appliance be 
common vented with an existing gas burning 
appliance. 
Note: Before connecting this appliance to an 
existing vent system consult with your local 
architect, planner or building official.

Lowest

Discharge

Opening

Listed

Vent Cap

8 Ft. Min.

Roof Pitch x/12

Listed Clearance

12

x

Listed

Gas

Vent

H (Min)

Height

From Roof

Flat to 6/12

1.0

ax 0.30

6/12 to 7/12

1.25

0.38

Over 7/12 to 8/12

1.5

0.46

Over 8/12 to 9/12

2.0

0.61

Over 9/12 to 10/12

2.5

0.76

Over 10/12 to 11/12

3.25

0.99

Over 11/12 to 12/12

4.0

1.22

Over 12/12 to 14/12

5.0

1.52

Over 14/12 to 16/12

6.0

1.83

Over 16/12 to 18/12

7.0

2.13

Over 18/12 to 20/12

7.5

2.27

Over 20/12 to 21/12

8.0

2.44