Hi, this is Russ, I'll be helping you with your problem today. THANKS! This is a problem due to the tall chimney and breaking the draft when the door is opened. Air has a weight even though we dont feel it and the heat in the chimney LIFTS the smoke and air.... there is a sudden pressure change or negative pressure when the door is open the smoke reverses direction and "falls " out the door. THANKS to overcome this a good heat contractor may be able to install a damper/fan to help out. Without seeing it I can not be specific as to your needs. THANKS
So, there is nothing that I can do at this end, short of having a contractor come in?
That is correct....the old time chimney makers knew how to overcome this,ut the pipe type chimenys are a different story. Sorry, but this is a fact of life with this situation. GOD BLESS
You ahveto rememer that if a wrong CFM fan is used all the heat gets sucked out so this is a balncing act.
sorry for typo's