Vanguard Heating Gas Log Heater User Manual

12

103515

You must have non combustible material(s) above the fireplace opening. Non
combustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch
thick. With sheet metal, you must have non combustible material behind it. Non
combustible material must extend at least 8 inches up (for all models). If non
combustible material is less than 12", you must install the fireplace hood accessory
(24" and 30" models only). Even if non combustible material is more than 12", you
may need the hood accessory to deflect heat away from your mantel shelf. See
chart below and Figures 6 and 7 for minimum clearances.

IMPORTANT:

 If you cannot meet these minimum clearances, you must operate

heater with chimney flue damper open. Go to Installing Damper Clamp Accessory
for Vented Operation, page 14.

If above minimum clearances are not met, you must have a hood. Follow
minimum clearances shown in Figure 7 on page 13 when using hood.

12" or more

Non combustible material OK.

Between 8" and 12"

24" or 30" Models: Install fireplace hood accessory
(GA6050 or GA6052, see 

Accessories, page 34).

18" Model: Non combustible material OK.

Less than 8"

Non combustible material must be extended to at
least 8". See 

Between 8" and 12", above. If you

cannot extend material, you must operate heater with
flue damper open.

If you meet minimum clearance between mantel shelf and top of fireplace opening,
a hood is not required (see Figure 6).

Minimum Non-
Combustible 
Material 

Minimum Non-
Combustible 
Material Height 

Distances to 
Underside of
Mantel 

Top of Fireplace
Opening

Underside of
Mantel Shelf

Mantel Shelf

12"

8"

20"

14"

24

1/2

"

16

3/4

"

27

1/2

"

18

1/2

"

30"

20"

All minimum 
distances are
in inches

Log Set
24"/30" Models

18" Model

2 

1

/2

"

6"

8"

10"