CLEARANCES and HEIGHT REQUIREMENTS
Heat resistant material (minimum requirements) with wooden mantel or other combustible projection:
To install the heater with a wooden mantel, shelf or other combustible projection above, first measure the heat resistant mate- rial shown in Figure 6, then refer to Table B.
| 8" or More of |
| Heat Resistan |
Hood | Material |
| |
Heater in |
|
Fireplace or |
|
Firebox |
|
Figure 6 - Measuring Heat Resistant Material for Mantel
HEAT RESISTANT
MATERIAL
MEASUREMENT
REQUIREMENTS FOR SAFE INSTALLATION WITH WOODEN MANTEL,
SHELF OR OTHER COMBUSTIBLE PROJECTION
NB18 | NB24 |
12" or more | Hood not required. Observe profiles (side | Hood not required. Observe profile (side |
| elevations) shown in Figure 7, page 14. | elevations) shown in Figure 9, page 15 |
8" to less than 12" | Install hood and observe profiles showin in | Install hood and observe profiles shown in |
| Figure 8, page 14, OR extend heat resis- | Figure 8, page 14; OR extend heat resistant |
| tant material to at least 12” and observe | material to at least 12" and observe profiles |
| profiles shown in Figure 7, page 14. | shown in Figure 9, page 15. |
Less than 8" | Extend heat resistant material to at least | Extend heat resistant material to at least 8", |
| 8", install hood and observe profiles shown | install hood and observe profiles shown in |
| in Figure 8, page 14; OR extend heat resis- | Figure 8, page 14, OR extend heat resistant |
| tant material to at least 12" and observe | material to at least 12" and observe profiles |
| profiles shown in Figure 7, page 14. | shown in Figure 9, page 15. |
|
|
|
TABLE B - Heat Resistant Material Heights and Mantel Location
81D0107 | 13 |
