TWO WARRANTIES TO PROTECT YOUR INVESTMENT. UNMATCHED BY OTHERSTHIS UNIT HAS A LIFETIME PRO RATED WARRANTY THAT COVERS CUSTOMER ABUSE YES CUSTOMER ABUSE AS LONG AS YOU RETURN THE BAD EXCHANGER TO US. THE SECOND WARRANTY IS LIFETIME AGAINST MFG DEFECTS FOR AS LONG AS YOU OWN THE HEAT EXCHANGER. SEND REQUEST FOR COPY OF WARRANTY TO ANDERSONS OUTDOOR