R
7100FP EPA Woodburning Fireplace
A. Chimney Requirements
Vertical distances are measured from the base of the fire- place as shown in Figure 21.1.
Minimum overall straight height | 13 ft | 3.96 m |
Minimum height with single offset/ | 14.5 ft | 4.42 m |
return |
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Double offset/return minimum height | 20 ft | 6.1 m |
Maximum height | 50 ft | 15.24 m |
Maximum chimney length between an | 20 ft | 6.1 m |
offset and return |
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Maximum distance between chimney | 35 ft | 10.67 m |
stabilizers |
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Maximum unsupported chimney | 6 ft | 1.83 m |
length between the offset and return |
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Maximum unsupported chimney | 35 ft | 10.67 m |
height above the fireplace |
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Maximum unsupported chimney | 6 ft | 1.83 m |
above roof |
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Note: A maximum of two pairs of offsets and returns may be used.
WARNING
Fire Risk
•Must maintain 2 in. (51 mm) air clearance to insulation and other combustible materials.
6 ft (1.83 m) max. unsupported chimney above roof
6 ft (1.8 m) max. unsupported run
20 ft (6.10 m) max. pipe between an offset & return
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| 35 ft (10.7 m) | |
Ceiling firestop | max. straight | ||||
unsupported | |||||
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| chimney height | |
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14.5 ft (4.42 m) min. height/single
46 in.
20 ft. (6.10 m) min. height/double
(1168 mm)
to top of50 ft (15.24 m) max. height standoffs
Figure 21.1 Chimney Requirements
B. Chimney Termination Requirements
To determine the chimney components needed to complete your particular installation, follow the steps below:
•Determine the total vertical height of the fireplace installation. This dimension is measured from the base of the fireplace assembly to the point where the smoke exits the termination cap.
•Subtract the effective height of the fireplace assembly from the overall height of the fireplace installation (measured from the base of the fireplace to the bottom of the termination cap, 13 ft. (4m).
•Refer to Table 21.2 to determine what components must be selected to complete the fireplace installation.
•Determine the number of ceiling firestops, stabilizers, roof flashing, etc. required to complete the fireplace installation.
Table 21.2
HEIGHT OF CHIMNEY COMPONENTS | in. | mm | ||
Chimney Stabilizer |
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| SL3 |
| 121 | |
Firestops Spacers |
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| FS338 |
| 0 | 0 |
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| FS339 |
| 0 | 0 |
| FS340 |
| 0 | 0 |
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Offsets/Returns |
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| SL315 | (15º) | 340 | |
| SL330 | (30º) | 394 | |
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Roof Flashing |
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| RF370 |
| 0 | 0 |
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| RF371 |
| 0 | 0 |
Chimney Sections* |
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| SL306 |
| 121 | |
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| SL312 |
| 273 | |
| SL318 |
| 425 | |
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| SL324 |
| 578 | |
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| SL336 |
| 883 | |
| SL348 |
| 1187 |
* Dimensions reflect effective height.
WARNING
Asphyxiation Risk.
•Do NOT connect this unit to a chimney flue servicing another appliance.
•Do NOT connect to any air distribution duct or system.
May allow flue gases to enter the house.
September 7, 2007 | Page 21 |