R
Isle Royale Wood Stove
Thimble
Site constructed for masonry chimney installation:
Components
•A minimum length of 12 inches [305mm] (longer for thicker walls) of solid insulated
•Wall spacer, trim collar and wall band to fi t solid pack chimney selected.
•Minimum 8 inch (203mm) diameter clay liner section (if not already present in chimney) and refractory mortar.
Air Clearances
• Masonry chimney clearance must meet NFPA 211 mini- |
mum requirement of 2 inches (51mm) to sheet metal |
supports and combustibles. |
• Minimum of 1 inch (25mm) clearance around the chim- |
ney connector. |
• Top of wall opening is a minimum of |
(343mm) from ceiling or |
minimum clearance specifi ed by chimney connector |
manufacturer. NFPA 211 minimum vertical clearance of |
18 inches (457mm) from chimney connector and ceil- |
ing or minimum recommended by chimney connector |
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| ceiling |
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| 13.5” below ceiling to top | ||||||
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| of opening | ||||||
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| Wall | or top of opening is a min.of | ||||||
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| Minimum18.0” |
| 4.5” below min.clearance | ||||||||||||
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| specified by connector mfg. | |||||||||||||
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| NFPA 211 |
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| 1.5 | 2x2 framing stud | ||||||||||||
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| 2.0 | min air clearance | |||||
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| 1.0 | min air clearance | |||||
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| 4.5 |
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| 1.5” |
| 2.0” | ||||
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| 1.0” |
17.0” OD 14.0” ID 8.0” |
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| 1.0” |
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| 1.5” |
| 2.0” | ||||
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Center of Hole |
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| Thimble |
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Include depth of hearth pad
Figure 15.1
manufacturer. Figure 15.1. |
Instructions:
1. | Open inside wall at proper height for the chimney con- |
| nector to entry the masonry chimney. Figure 15.1 |
2. | Entry hole to masonry chimney must be lined with an 8 |
| inch (203mm) minimum diameter clay liner, or equiva- |
| lent, secured with refractory mortar. |
3. | Construct a 17 inch x 17 inch (432mm x 432mm) out- |
| side dimension frame from 2 x 2 framing lumber to |
| fi t into wall opening. Inside opening of frame should |
| be no less than 14 inch x 14 inch (356mm x 356mm). |
| Figure 15.1. |
4. | Attach the wall spacer to the chimney side of the frame. |
Trim Collar
Chimney Section 
with 2 inch 
(51mm) 
Clearance to 
Combustibles 
Chimney
Connector
Fire Clay Flue
Liner
with Airspace
Masonry
Chimney
Wall Spacer
Wall Band to
Secure Chimney
Section
Wood Studs Used for Framing - Spaced
2 inch (51mm) clearance from Masonry Chimney
5. | Nail the frame into the wall opening. The spacer should |
| be on the chimney side. |
6. | Insert the section of the solid insulated chimney into |
| the outer wall of the masonry chimney. |
7. | Tightly secure the length of the solid insulated chimney |
| with the wall band to the masonry chimney. |
8. | Insert a section of chimney connector into the chimney. |
| Make sure it does not protrude past the edge of the |
| clay chimney liner inside the chimney. |
9. | Seal the end of the chimney connector to the clay liner |
| with refractory mortar. |
10. Install trim collar around the sold pack chimney section. | |
Figure 15.2 - Solid Pack Chimney with Metal Supports as a Thimble
WARNING
Fire Risk.
Do NOT pack insulation or other combustibles between spacers.
•ALWAYS maintain specifi ed clearances around venting and spacers.
•Install spacers as specifi ed.
Failure to keep insulation or other material away from vent pipe may cause fi re.
November 22, 2011 | Page 15 | |
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