The passerby wrote:Yesterday, I came across a user's opinion on the site
ciao.fr, and what I read amazed me by its simplicity:
In a house heated by a closed fireplace, the principle is to get a large flow of fresh air from outside (or a basement) just under the fireplace.
Then the following things happen:
- The air creates an overpressure in the house.
- When passing over the walls of the fireplace, the cold air heats up and expands, further amplifying the overpressure.
- The volume of hot air in the rooms tends to swell and take up more and more space, thus expelling the colder air in the lower part of the rooms towards the natural low openings (below the door, etc. ...)
As a result, the cold air no longer enters the house through the joints of doors or windows, but on the contrary, it is the cold air from the bottom of the rooms which is evacuated outside by these same "openings"!
I tested this system today by dismantling the VMC from the attic and using it to blow the cold air from the garage just into the fresh air intake that comes out under the fireplace ..... the result is there: it is warmer in the room where the fireplace is, and it is much warmer than before in other rooms
Suddenly, I removed the "tubes" from the bottom of the door ... a treat, no more cold air.
The air is also renewed constantly, I find this system rather great!