It's not the seller's fault. It's my fault for not looking more closely. I did not know that there was both a IV ST and just a IV. In my excitement to get it I must have missed that small detail. It's done now. I just wanted to ask if anyone knew what the difference between the two models was. All t...

I've been using my trusty old Resmed VPAP IV ST for over 10 years now and I have grown very attached (but mostly, used to) to it. Recently I started to feel the pressure wasn't as strong as it normally was and I figured it was finally starting to conk out. After doing all the usual checks (filters, ...