INSTALLING Minimum Non Combustible Material Clearances
Continued
101309
If Using Mantel
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 13.
| Non Combustible | Requirements for |
| Material Distance (A) | Safe Installation |
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| 12" or more | Non combustible material OK. |
| Between 8" and 12" | 24" or 30" Models: Install fireplace hood |
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| acessory (GA6050 or GA6052, see |
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| Accessories, page 33). |
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| 18" Model: Non combustible material OK. |
| Less than 8" | Non combustible material must be |
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| extended to at least 8". See Between 8" |
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Mantel Clearances |
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If you meet minimum clearance between mantel shelf and top of fireplace opening, a hood is not required (see Figure 6).
Mantel Shelf
10"
Underside of
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| 6" |
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| 2 1/2" |
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Minimum Non- |
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Combustible |
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Material |
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| 12" | 20" | 241/2" | 271/2" | 30" |
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| 8" | 14" | 163/4" | 181/2" | 20" |
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Minimum Non- | Distances to |
Combustible | Underside of |
Material Height | Mantel |
Figure 6 - Minimum Mantel Clearances Without Using Hood
If above minimum clearances are not met, you must have a hood. Follow | |
minimum clearances shown in Figure 7 when using hood. | Continued 11 |