Re: wave ventilation
Nice & neat install .... that fan looks identical to the central exhaust fan I installed for my bathroom.
While this does relieve some of the confinement you can't be sure the amount of air entering the "hatch" is identical to the amount of air being exhausted ..... afterall wouldn't that be the way it would become neutral?
My "Hatch" open area is like an open window.
It relieves the "confinement" issue so all suction is neutralized
Unless you have measured the CFM's being exhaused versus the CFM's being introduced from the "hatch" as make up air .... you have to be cautious the exhaust isn't more than the make up .... the air being exhausted has to come from somewhere.
My oil burner has the same or more air available and in reality is not in competition with the fan
This is more important in those spaces that contain combustion equipment.
Personally I prefer the air/air exchangers or the HRV/ERV which are a balanced exhaust system....... meaning there isn't negative pressure since they replace the same amount of fresh air as exhauted air from the home.
"" an ounce of perception -- a pound of obscure "