SCAN DSA 5 - Chimney height requirements:

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Chimney height requirements:
The chimney must extend 3 feet above the level of roof penetration and a minimum of 2 feet higher
than any roof surface within 10 feet. Check with your local building officials for additional requirements
for your area.
The condition of the chimney and height is very important; we suggest a total minimum height of 15’
(4,5m).