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What is a Class A Chimney?

Class A chimney is a complete chimney system.  Class A chimney does not require any masonry.  It is an independent unit.  Class A chimney is designed for residential use and can be installed on the exterior or the interior of the home. Class A chimney pipe is a double wall pipe that is designed to vent almost any fuel.  This double wall chimney pipe is insulated with one inch of insulation.  The double wall construction can reduce the clearance to combustibles to 2″. If you need a new chimney, a double wall Class A chimney pipe may be an excellent alternative to a masonry chimney. It is an independent unit. It is designed for residential use and can be installed on the exterior or the interior of the home. Class-A Chimney; For All Fuels All are UL Listed to the 103HT Standard

Class A Chimney Advantages

What are the advantages of installing a metal chimney?  There are many advantages installing a double wall chimney.  This is a factory built chimney that can be installed in place of a masonry chimney. Another advantage of installing a Class A Chimney  is that in a few hours you have a new metal chimney.  A masonry chimney is much more labor intensive and requires a higher skill level.  By the time you purchase all the materials to build a block chimney and install a stainless steel liner, you may be spending more than you would if you installed a factory built chimney. One thing you cannot do with a masonry chimney, is install a chimney in the middle of the home starting on any floor.  A Class A double wall pipe requires only 2″ of clearances to combustibles.  With a Class A Chimney, you can start your chimney where ever you want in the home, whether it is in the basement of even in the attic, it is possible with a factory built chimney. 

​Our Class A Chimney sets the standard in quality and performance for chimney systems.

Chimney Safety Institute of America - See more at:

Southern Maine Chimney Service