Laminar Flow Hood v. 2 with a replaceable pre-filter and replaceable fan.
How To Design and Build A Laminar Flow Hood: Part 1 - Design - YouTube
How to Build a 24x24 Laminar Flow Hood - YouTube
Amazon.com: Updated Fan Filter Unit HEPA-Filter Laminar Flow Hood 22.6x22.6 Inch for Class 100 / ISO 5 Cleanliness Clean Room/Mycology Work/Mushroom with Safety Lock (110V) : Industrial & Scientific