This wall thimble measures 9" x 14 3/4" and will fit wall depths from 4" to 6 1/2" and includes an insulation ring to reduce air infiltration where the pipe slides through the thimble.
Combustion Air System is a patent-pending design that pre-heats combustion air. Inbound air is circulated through baffles around the heated areas of the wall thimble pre-warming the combustion air before it is delivered to your stove
All parts are factory made from the manufacturer and will be handled on a case by case basis, depending on the warranty policy of the manufacturer. Some manufacturers make this a very simple and easy process unfortunately others do not. Please be advised that warranty claims for these parts may take up to 4 weeks for processing, and customers must cover shipping. Enviro & Napoleon notoriously take forever on warranty claims.Click here to submit a warranty claim for this item.
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