What assurance do you have the catalytic combustor will last in your E.P.A. certified appliance?

You will be given a prorated limited lifetime warranty from Applied Ceramics which states, Applied Ceramics warrants to the consumer who purchases a Firecat Versagrid catalytic converter as a component in an E.P.A. certified solid fuel appliance, to replace at no charge to the consumer the Versagrid catalytic converter that ceases to function within three (3) years from the date of purchase by the original consumer, providing we receive a dated copy of the original bill of sale for the stove, along with the original Firecat catalytic converter. 

Applied Ceramics also offers special prorated prices on the converter for the 4th, 5th and 6th years of the stove's life if ever needed. 

They couldn't make this offer, if they had doubts about the longevity of the unit.