This is what I use,"Omron-NE-U22V " it has been around for over 10 years.
It works The Same way the E Flow works at a fraction of cost.
Yep, I pay out of Pocket for everything Cf..
<a target=_blank class=ftalternatingbarlinklarge href="http://www.wholesalepoint.com/pc-Nebulizer-Systems/Omron-NE-U22V.html">http://www.wholesalepoint.com/...ems/Omron-NE-U22V.html</a>