Freddy wrote:My tiny brain can't wrap around much so I keep it simple for myself: Would I rather have 72 degree air go up the chimney (barometric damper), or would I rather have 500 degree air go up the chimney? (no barometric damper).
That's a good argument Freddy. That 500 hundred degree air can't go up the chimney if it can't be replaced. Air in equals air out and vice versa.