Skyjob,
Keep it factual, provide evidence based proof to the conversation and refrain from having a dig at each other or others for that case.
As you will notice as you digest through our posts and kramer constant and latest insult above,that my posts are using technical information from the AMM rather than basic say.(not sure what other info i can use to explain my idea,.and yes Kramer the Pack assemply gets input from actual cabin altitude.Id send you pictures of the pack assemply diagram and its link to the mix manifold but the latest naming did it.
Im ready to be explained otherwise..maintenance input accepted,just not by arguments such as
recirc fans blow air in the cabin like in a car and packs pressurize the aircraft.
Im done here..as all i had to contribute was written on this subject.