Just had new castle serenity stove installed yesterday. Looks good overall. In playing around a bit with it, I noticed a slight smoke smell when I start it up from after its been off. I turned light off and shined flashlight on exhaust pipe in back of stove. Saw some wispy smoke around pipe, which disappeared once pellets ignited. I just emailed the installer putting in this inquiry. FWIW, this is a basement install in a walk out basement. What do you all think?