Minimum Non-Combustible Material Clearances

CGD3924NR, CGB3924NR and CGB3930NR

UVENTED NATURAL GAS LOG HEATER

INSTALLATION

Continued

Minimum Non-Combustible Material Clearances

If Not Using Mantel

Note: If using a mantel, go to If Using Mantel. If not using a mantel, follow the information on this page.

You must have non-combustible material(s) above the fireplace opening. Non-combus- tible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have non-combus- tible material behind it. Non-combustible material must extend at least 8" up (for all models). If non-combustible material is less than 12", you must install the fireplace hood accessory (24" and 30" models only). See Figure 5 for minimum clearances.

IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open.

If Using Mantel

You must have non-combustible material(s) above the fireplace opening. Non-combus- tible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have non-combus- tible 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 Figure 5 and Figures 6 and 7 on page 9 for minimum clearances.

IMPORTANT: If you cannot meet these minimum clearances, you must operate heater with chimney flue damper open.

Non-Combustible	Requirements for
Material Distance (A)	Safe Installation

12" or more	Non-combustible material okay.
Between 8" and 12"	Install fireplace hood accessory (GA6050, GA6052,
	or GA6053, see Accessories, page 21).
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.

Heat Resistant

Material

(A)

Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace

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