I have the ci 2600 insert and the f3500 stove. The F3500 I would get smoke backing up to the house when adding wood I would get smoke backing into the house but draft was fine once I would crack the door and full operation mode. I added 2 feet of pipe and just about eliminated the problem. So definitely a possibility that can be a reason you get smoke in the house but opening the door to fast will just about always let smoke in the house. Open the bypass, open the air all the way, wait a few seconds about 20 to 30 seconds then open the door slowly.Wolves. I was concerned about the chimney being a bit low and mentioned it prior to installation. The installer didnt think it was an issue. I occasionally get eddies of smoke near the top of my roof but the draft is always strong.... Perhaps too strong. With the door cracked, I get plenty of airflow; even when cold starting. Often, when i refuel after the fire is established, the draft is so strong that it makes cyclical throbbing roars and makes the stove intake whistle. Is the main benefit of extending the chimney above the roof to help increase draft or do you think there is something else to gain from it? I should also note that I do get slight back smoking if i open the door too quickly but this is infrequent and usually only during a cold start (slowly opening the door eliminates this).
Also, its pretty clear that you've been involved in the CI2600 thread since the beginning. Neither regency nor my stove supplier have acknowledged the existence of a draft reduction plate. Do you know if this modification was completely eliminated in the newer versions of the stove? My gut feeling is that something about my setup is creating too much draft and that the standard size of the stoves airflow control orifice is too large to regulate it.
As far as i know, my liner is not insulated at the damper. I don't recall the stove installers cramming any mineral wool in there. What are your thoughts on block off plates?
I believe the restriction plate is included on the new stoves. If you run your hands to the right and left of the hole the air comes in, outside the little housing surrounding the intake there are two metal wings that will allow to slide it off if you want more draft. A block off plate will always make the insert more efficient.