Vermont Castings • Apsen C3 Installation Manual_R2 • 2019 - ___ • 07/19
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8390-950i
F. Chimney Location (2-10-3 Rule)
These are safety requirements and are not meant to assure proper flue draft.
This appliance is made with a 6” (152 mm) diameter chimney connector as the flue collar on the appliance.
• Changing the diameter of the chimney can affect draft and cause poor performance.
• It is not recommended to use offsets and elbows at altitudes above 4000 feet above sea level and or when there are other
factors that affect flue draft.
3 ft (91 cm)
Minimum
Less than 10 ft (305 cm)
2 ft (61 cm)
3 ft (91 cm)
Minimum
10 ft (305 cm) To Nearest Roofline
2 ft (61 cm)
Pitched Roof
Figure 3.13
10 ft. (305 cm) or more
3 ft. (91 cm) Minimum
Less than 10 ft. (305 cm)
2 ft. (61 cm) Minimum
3 ft. (91 cm) Minimum
Wall or Parapet
Flat Roof
Figure 3.14
