I too was wanting an explanation for how the flow rate from an LP hose is not sufficient for heavy breathing?
I can assure anyone, the Air Buddy can deliver sufficient air volume at depth for normal diving.
I have two questions.
1. Do you remove it from your mouth every time you exhale?
2. Who services it? It's rubber and has moving parts right?
Or I guess for $40 just throw it away when it needs it and buy another one.
1. No, you pinch it between your teeth, biting causes air to flow, the harder you bite, the more air you get. You leave your lips open and the excess and your exhalation vent. The Air Buddy does not free flow, it is a demand device.
2. Beats me, I guess Air Buddy does. What is to service really. I service my own gear and if I cannot buy the parts I make them or a buddy does or his buddy does or in this case Air Buddy apparently does.
As to regulator donation, like any integrated BCD inflator (Air Source combined inflator second stage units) air source such as the Air Buddy model the OP is interested in, one would donate their primary to the OOA diver and the Air Buddy would be utilized by the assumed practiced rescuing diver. You would not donate the Air Buddy. This is really easy.
Like I said, I just ordered another, my first one is on a hose, this one is the BCD integrated inflator model.
Hey, it is Nitrox ready

. Let's get outside the box of norm think, okay guys.
N