That's the one I bought and I love it, So much I bought a couple more.
I have that one too, and I like it, but I fired it up on Friday and it isn't emitting O3. It runs and puts out air but it isn't O3. Its 2 years old.
But the manufacturer sells a repair kit ~$33 so I ordered the kit. While I was on the website, I saw another unit that is slightly larger (on sale now for $103), so I ordered one of those, too. I will have an 800 output for the laundry room and my 600 unit will travel with me.
Only one minor complaint about the A2Z6, is the tube port...the hose pops off if you aren't careful. It needs a slight mod.
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