Thanks for the information and comments. To answer the questions:
-There are no other fans in this small detached building, it doesnāt have a second storey and is pretty airtight.
-Iāve attached a couple images that show the height difference between the āShedā and the main house is not as significant as the diagram shown (thanks for that article by the way, good info!). Also, itās made no difference if itās a very calm or very windy day.
-I think it possibly wouldāve been better to have the combustion air vent at floor level (from what Iāve read). But Iāve attached a screenshot of the installation manual for this fireplace, and it looks like the raised vent meets the requirements.
-Mirco22, I donāt understand what you mean when you said, āyour chimney flue is too short to even have a draft damper, the draft reverses direction!ā
A couple questions I have:
1. Iām still not clear on how (without ripping walls apart) I could check for a blockage in this Outside Air Vent? Also, how I could confirm that the āopen & closedā mechanism (lever) to this vent is operating properly.
2. Again, excuse my ignorance⦠But the air that comes in through the outside combustion air vent ā I assume it comes in and surrounds the cavity behind the firebrick panels. How does that air filtrate through to the fire? Is it through that inch gap that is just behind the decorative marble mantle surround? Iām confused why I didnāt feel any air coming through there when we had a fan connected to the outside of this vent blowing a significant amount of air through it.
Thanks again!
