Brand unimportant, just make sure that it has an air dryer, not an
oxygen concentrator inside. And the air compressor / blower should
draw from outside air, not inside the space. Components upstream of
where ozone is made are in general intolerant of ozone being sucked
back into the unit.

http://www.air-zone.com/xt6000.html

The above is the company/model that has caught my eye. If you have some
spare time can you take a look and offer some comments?

Thanks.