To night we decided to have the fire of the season in out new/ used Hybrid. Well I feel like I never owned a stove before. As I was trying to light a fire, for some reason smoke was coming out the air intake in the back of the stove. Smoke every where. Ok, so now I have a strong draft going, add some more wood. Next,waiting for the stove top to reach 250* so I can engage the cat, once it does, I flip the lever and I guess I did it right. Now I didn't make a big fire but once I engaged, the secondary's kick in, then fire slows down a little and it's back up and running strong, secondary's are kicking in again. Stove top right now is at 350 nice little fire but How do I know if the brand new cat is working? Thanks for any help Fespo