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B. Clearances to Combustibles, United States and Canada (UL and ULC)
Minimum Clearances to Combustible Material
Inches and Millimeters
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| USA and Canada |
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| A | B | C | D | |
Masonry, Heat Exchanger & Zero | 19.75 in. | 21.5 in | 14.0 in. | 13.0 in. | |
Clearance | (381) | (584). | (508) | (330) | |
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MANTEL CLEARANCES |
| 21.5 in. | 14.0 in. |
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n/a | (584) | (508) | n/a | ||
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FLOOR PROTECTION | USA | Canada | |||
Floor height 0 in. to 3.5 in. | E | F | E | F | |
(0 to 89mm) below Insert Base | 18 in. | 8 in. | 18 in (457) | 12 in. (305) | |
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Floor height greater thant 3.5 in. |
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(89mm) below Insert Base | 16 in. | 8 in. | 18 in. (457) | 12 in. (305) | |
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EMBER PROTECTION: | Required on all installation for USA & Canada | ||||
THERMAL PROTECTION |
| Canada Only |
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Floor height 0 in. to 3.5 in. | See Figure 32.1 |
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on page 32 |
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(0 to 89mm) below Insert Base | 1/4 inch, R value = 0.13 |
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| See Figure 32.3 |
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| on page 32 |
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Floor height greater than 3.5 in. | No Thermal Protection required only Ember | ||||
Protection |
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(89mm) below Insert Base |
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*See Alternative Floor Protection Worksheet on page 33.
Maximum Mantel Depth - 10 inch (254mm)
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| Mantel |
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SideWall | B | Fascia or Trim | |
| *C |
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| A | Insert | ** |
| Fuel Door | D | |
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| F |
| E |
Hearth Extension
* Maximum 3/4 inch (19mm) trim depth ** Maximum
In Canada a full length 6 inch (152mm) diameter S635 flue liner required as per ULC S628.
In USA a minimum 5 foot length, 6 inch diameter flue liner is required as per UL 1482.
WARNING
Fire Risk.
•Comply with all minimum clearances to combustibles as specified.
•Failure to comply may cause house fire.
NOTE: Clearances may only be reduced by means approved by the regulatory authority having juris- diction
Mantel |
(559mm) |
Minimum |
Figure 31.1 - Mantel Clearance
December 15, 2009 | Page 31 |