These are my neighbor’s HEPA filters that he bought for his clean room. They are highly-efficient, positive flow units that fit into t-bar suspended ceiling grids and come complete. They have been stored in plastic bags since removal and are in like-new condition. They came from a commercial installation and run on 277 volts…so I cannot demonstrate how well they work with the 120/240V power I have available. Each unit is 3-speed, all 4 units will run on a single circuit, and the specifications are in the link below:
These start at $500 each used and the price has been drastically lowered to accommodate your risk factor and entice the buyer despite the commercial voltage needed. If you’re building a clean room, chances are you have a commercial space and have 277/480v power available anyway. Or you can get a buck-boost transformer to work with your 120/240V service.
$200 each or buy all 4 for $600!
My neighbor has a new business that doesn’t require a clean room, and he’s just trying to recover some of his investment.
Highly filtered air supply, up to 695 cfm air filter
JJ