If you are seeking a perfectly functional, reliable, & quiet concentrator and can tolerate a few blemishes to the exterior of the unit, this is a great machine at a great price!
The concentrator has $16K hours, and with proper upkeep, should last up to $40K hours.
Please shoot me a text or send me an email. I am able to deliver the machine if need be at no charge within the greater Greeley area.