It's been extremely foggy here all night and still now in the middle of the afternoon. The house was cooling down (nearly a chilly 68 inside!) so thought I'd warm things up a bit. Besides that, I have too much seasoned wood anyway (according to family/friends who don't realize you can't have too much). This was really just a test to see about draft. Some here have posted about problems when too warm outside. Well it's 50 degrees out there, real foggy heavy air. I lit up the Lopi (from cold start) and wow, not a bit of trouble taking off. A couple stack checks from the outside indicated no more than 5 minutes of heavier smoke that settled in the back yard for a short. Then at 10 minutes, little visible smoke till the 15 minute mark where I couldn't see any. I've got to account the success to my recently insulated flue liner within an outside masonry chimney. First two seasons the liner was not insulated, did ok, but that was before I knew how much better it could be.