I know there are so many knowledgeable people here, I actually remember reading about rocket stoves and mass heaters here and was blown away by peoples experiences, knowledge and skills.
On to the question which I'm sure is simple I'm just curious as to how it might go about working:
If you had a box which was airtight except for 2 holes on the 'floor' on even side open to the air - and a fire burning in the middle, would the convection currents eventually cause one hole to become the 'exhaust' with hot air leaving one and the other to become the 'intake' drawing cold air in?
Would size of the holes, or level relative to each other (one hole in a recess 'lower down' in the box) make any difference?
Looking at means of heating where the air inlet and exhaust are on the ground.
1 other thing to mention is the system is closed, therefore it wouldn't matter if exhaust was 'blown back' into the box, just curious how the physics works.