Chimney tee cover for 6" chimney tee (P/N 2500244, 2500416 & 2500620).  Affected models: E-Classic 1450, Classic Edge 350/360/550/560, CleanFire 300/500, Forge 1500/3500.  Serial #'s affected for P/N 2900319: ECL1450 non-euro (S/N E102544 and up) and ECL1450 euro (S/N E102513 and up).  Order square chimney tee cover P/N 2000162 if prior to these S/N's.