Security Chimneys Secure Black 8DL36A Double Wall Adjustable Lengths 4000-4999 MIL: 29" Height Minimum Firebox

MIL: 29" Height Minimum Firebox Opening: IPI: 20"

So once you got to change from a vent free configuration to vented

Our trilateral design protects the fire from wind and lessens the spread of sparks and embers

Model 21 Manual

Can be used as primary or secondary heat depending on room requirements

Security Chimneys Secure Black 8DL36A Double Wall Adjustable Lengths 4000-4999 MIL: 29" Height Minimum FireboxOverview Since starting operations in 1960, Security Chimneys International has built a reputation as one of the most trusted suppliers of quality chimneys in North America. Our dedication to total quality lives in the research and development of new products and services for the residential and commercial markets. With a 104,800 square foot manufacturing facility in Laval, Quebec, we are fully equipped and accredited to certify that all our products