My Nyletherm came by FedEx yesterday. It was nicely packed on a little pallet. I happened to be in HD yesterday before unpacking and bought a bunch of stuff for plumbing it up, assuming it's 3/4". Alas, it's not 3/4", so I'll be going back. Will keep the crimping tool of course. Put the unit on a dolly and moving it here and there. I think the fan should be blowing out into the room. Anyway, work in progress, and my first effort with PEX.