The HEPAFLOW-12 seamlessly integrates a potent 135 CFM fan with a 12"x12" Ultra-Micron HEPA filter, certified to be 99.99% efficient at 0.3 microns, ensuring an immaculate working space by generating a 200 feet per minute down flow, surpassing standard laboratory and clean room criteria. Expertly constructed in the USA from 3/4" Cabinet-grade plywood, each Bonsai Flowhood is meticulously handcrafted and rigorously tested by certified technicians. Included features comprise an intuitive on/off switch, optional acrylic air buffers for instructional purposes, a replaceable micron filter with a 3-5 year lifespan, and a comprehensive user's guide. Additionally, it comes with a 1-year full parts and labor warranty and is available. Easy 10 Minute assemby, only a screwdriver needed. The replacement filters are sold separately.