First of all, it is spelled out in the U.S. Federal Register this way: If the affected facility is a catalytic wood heater, the warranty for the catalytic combustor shall include the replacement of the combustor and any prior replacement of the combustor without charge to the consumer for:
(1) 2 years from the date the consumer purchased the heater for any defects in workmanship or materials that prevent the combustor from functioning when installed and operated properly in the wood heater.
(2) 3 years from the date the consumer purchased the heater for thermal crumbling or disintegration of the substrate material for heaters manufactured after July 1, 1990.
All combustors sold as a component of an EPA-certified wood burning appliance must be EPA approved. The Versagrid Firecat catalytic combustors are approved by the U.S. EPA.
The Versagrid Firecat catalytic combustors carry a six year prorated Limited Lifetime Warranty. With the first 3 years having free replacements as spelled out above.