Phaeton wrote:Absolutely right! This is what the manufacturer assembles this flap for - and it should be used PROPERLY.It is coarsely regulated in a wider range and more precisely with the flap on the door. This is the basic issue if we want to heat the house, not the surrounding area.

In this thread, I have already given a broader explanation in this forum > https://www.elektroda.pl/rtvforum/topic3117704-30.html, in my post No. 48 and 53 .
Ptak3124 wrote:There may be an inexperienced smoker, but let him be a rational, thinking person. which will NOT "obstruct the outlet almost completely". Anyway, even with the strongest wind (when there is the highest draft in the chimney) it is simply impossible to almost completely cover the chimney outlet, because you can hear that the stove stops "working" and smoke appears in the boiler room.And what happens when an inexperienced smoker ignites the boiler in windy weather, when the chimney draft is extremely strong?
Use the chimney flap to regulate the draft and cover the outlet almost completely.