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The compact Bonsai FFU: HEPA-filtered air over a bench-sized work area.
The Bonsai 2' x 2' fan filter unit is the compact way to get HEPA-filtered air over your bench. It's the smallest FFU in the Bonsai lineup, sized for home labs and growers moving up from a still air box, and it delivers ISO Class 5 clean air without the footprint of a full cabinet hood.
Every Bonsai fan filter unit pairs a true H14 HEPA filter with a backward-curved aluminum blower, a washable magnetic pre-filter and a 20-gauge powder-coated steel housing. It plugs into a standard 120V outlet and sits on an ordinary table, since the housing is only 14" deep.
The H14 HEPA filter is rated 99.995% at 0.3 micron, the standard for ISO Class 5 (Class 100) clean air, in a microfiber pack held in an aluminum frame.
At 25" square and 37 lb, it fits a standard work table and moves easily with the built-in pull handles.
An aluminum centrifugal blower instead of the plastic fans in many budget units, three speed settings, and a pre-filter you rinse clean so the HEPA lasts longer.
Pour plates and make clean transfers in filtered air.
Inoculate grain jars, spawn bags and substrate.
Work with LC, clone tissue and load syringes.
Move up from a still air box to continuous filtered airflow.
Set it on a sturdy table with the filter face toward your work area.
Any grounded 110/120V outlet works. No special wiring.
Turn it on a few minutes before you start so the bench fills with filtered air.
Keep open plates and jars between the filter and your hands. Don't reach over them.
Filter planning. Rinse the magnetic pre-filter regularly and plan on a new HEPA filter about every 24 months for hobby use, or 12 to 18 months in a busy lab. An open agar plate test or a particle meter tells you when it's actually due.
Complete the setupStock your bench with pre-poured agar plates, sterile scalpels and sterilized spawn bags. Prefer a wood-cabinet laminar hood? Compare every option in flow hoods.
For most home growers, yes. It blows HEPA-filtered air across your work area for agar, liquid culture and inoculation, in a slimmer housing than a cabinet-style hood.
A true H14 HEPA filter rated 99.995% at 0.3 micron, which meets ISO Class 5 (Class 100) clean-air levels.
No. It plugs into any standard grounded 110/120V outlet.
About 50 to 60 dBA, similar to a window air conditioner.
Rinse the magnetic pre-filter now and then so it keeps catching larger particles, and replace the HEPA filter when an agar plate test or airflow check says it's due, typically every 12 to 24 months.
Bonsai FFUs have an 18-month limited warranty covering manufacturing defects under normal use. Unopened units can be returned; opened units are exchange only. We'll help with any shipping damage.
I received this by Fedex and it was packaged very well! Its about 35 pounds and actually fairly easy to move around. I was amazed by how completely plug-and-play it is—no assembly required, just set it on your worktable and plug it in, and you're ready for sterile work straight away. Its only got like 14-inch footprint so fits on any standard lab or kitchen surface without crowding your workspace, yet still delivers clean, laminar airflow ideal for agar work, grain-to-grain transfers, syringes, and other routine mycology tasks. That said, you could still consider a horizontal laminar flow hood if you frequently work very close to the edges—such designs typically maintain better airflow coverage across the lower work surface, giving you more room to maneuver around the edges without disrupting the clean airflow. But for the price, ease of use, and excellent performance of the Bonsai FFU, it’s a compelling and practical choice for anyone needing reliable sterile conditions without the complexity or cost of more elaborate setups.
This filter works great ! Keeps air moving and filtered well in my space. Agar work is a breeze with this unit paired with the stainless raised work space! Absolutely, would recommend!!!
This is one of the highest quality FFUs out there for the price. It came in perfect condition and arrived at my doorstep sooner than expected. I would just add a 16 x 16" home filter from the hardware store to the fan on the back with simple painters tape on the four corners to make the good expensive filter last even longer. The magnetic prefilter is cool, but not as effective as a home filter would be. I love standing up while working and having my hands free. Feels awesome not to have my hands in a box. So far zero contamination on any of my petri dishes made in front of this flow hood. Wow! So worth the money.
I have been shopping around and was about to buy this exact unit from a different vendor for $899 and saw this here! $200 savings!! Now I can buy groceries this week! Haha
Just got my new FFU today and it was packaged perfect- I already poured some agar and did some grain transfers! The frame and 3 speed settings are really nice features. Now just need to save up for the 2'x4' sometime soon!
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