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Description
bonsai tree air purifier Bonsai HEPA FFU Flow Hood Filter UnitMore clean air workspace than a 22 FFU, with the same compact 14" deep design. The Bonsai 3' 2' HEPA Fan Filter Unit (FFU) is a mid sized, cleanroom grade fan filter unit for mushroom cultivation and sterile lab work an affordable alternative to a full laminar flow hood, sized for mycology labs, agar work, sterile transfers, classrooms, and small production spaces. With a larger filter face than a standard 22 model, this FFU gives you more usable
More clean-air workspace than a 2×2 FFU, with the same compact 14" deep design.
The Bonsai 3' × 2' HEPA Fan Filter Unit (FFU) is a mid-sized, cleanroom-grade fan filter unit for mushroom cultivation and sterile lab work — an affordable alternative to a full laminar flow hood, sized for mycology labs, agar work, sterile transfers, classrooms, and small production spaces.
With a larger filter face than a standard 2×2 model, this FFU gives you more usable clean-air workspace while still fitting on standard worktables and benches. It's ideal for growers who need extra room for grain transfers, agar workflows, liquid culture, and inoculation without stepping up to a full 4×2 unit.
Unlike many lower-cost FFUs that use thin housings and plastic blower assemblies, every Bonsai FFU is built with upgraded premium components for smoother airflow, quieter operation, improved durability, and longer service life.
FFU or full laminar flow hood? For most home growers, this FFU works as a complete flow hood solution. To compare both options before you buy, read our Laminar Flow Hood vs FFU guide — we built and tested both to show exactly where each one shines.
Why Growers Choose the Bonsai 3×2 FFU
- Larger 3' × 2' Work Area – More clean-air space than a 2×2 FFU for higher-throughput sterile work
- True H14 HEPA Filtration – 99.995% efficiency at 0.3 microns for ISO Class 5 / Class 100 clean-air performance
- Compact 14" Deep Housing – Fits on standard stainless tables, lab benches, and workstations
- Upgraded Aluminum Centrifugal Fan – Backward-curved aluminum blower for smoother airflow and longer service life
- Washable Magnetic Pre-Filter – Reusable electrostatic pre-filter helps extend HEPA filter lifespan
- Quiet, Efficient Operation – Designed for extended lab sessions without excessive noise
- 18-Month Warranty – Backed by extended warranty protection for added confidence
What You Can Do With This FFU
- Pour and transfer agar plates in a wider clean-air zone
- Perform grain-to-grain transfers and larger spawn workflows
- Inoculate grain jars, spawn bags, and substrates
- Handle liquid culture, cloning, and syringe prep
- Build a dedicated clean-air workstation on standard tables or benches
- Upgrade from a still air box to true HEPA-filtered laminar airflow
Technical Specifications
HEPA Filtration System
| Component | Specification |
|---|---|
| HEPA Filter | True H14 — 99.995% efficiency at 0.3 microns |
| Clean-Air Rating | ISO Class 5 / Class 100 |
| Filter Media | High-efficiency microfiber in a durable aluminum alloy frame |
| Pre-Filter | Washable magnetic electrostatic pre-filter (MERV 5 / G4, 95% at 5µm) |
Airflow & Performance
| Setting | Airflow |
|---|---|
| Fan Control | 3-speed adjustable |
| High Speed | 120 FPM |
| Medium Speed | 110 FPM |
| Low Speed | 100 FPM |
| Average Airflow | 500–530 CFM |
| Average Velocity | 100–120 FPM |
Motor & Construction
- Backward-curved aluminum centrifugal blower for smoother airflow and durability
- 20-gauge powder-coated housing with commercial-grade construction
- Integrated pull handles for easier positioning
- Standard 110/120V grounded plug — no special wiring required
Noise & Power Efficiency
| Metric | Rating |
|---|---|
| Noise Level | Approximately 50–60 dBA (comparable to a window AC unit) |
| Power Consumption | Approximately 250W at 100 FPM |
Dimensions & Weight
| Measurement | Value |
|---|---|
| Dimensions | 38" W × 26" H × 14" D |
| Weight | 67 lbs |
| Resistance | 0.327–0.682 IWG |
Washable Magnetic Pre-Filter
The included reusable electrostatic pre-filter captures larger airborne particles before they reach the HEPA filter, maximizing filter lifespan and reducing maintenance costs. Unlike the disposable pre-filters found on lower-end FFUs, the Bonsai magnetic pre-filter is washable, reusable, and designed for long-term use.
Who This FFU Is Best For
- Growers upgrading from a still air box to active clean-air equipment
- High-volume agar, liquid culture, and transfer workflows
- Home labs, classrooms, and small production spaces
- Anyone needing more working area than a 2×2 FFU without moving up to a full 4×2 unit
Replacement Filters
HEPA filters are consumables that gradually load with particulates over time. A replacement H14 HEPA filter for the 3×2 FFU is available so you can keep a spare on hand. The washable magnetic pre-filter extends the main HEPA filter's life by catching larger particles first, so under normal use you'll replace filters far less often than with a standard FFU.
18-Month Warranty
Every Bonsai FFU is backed by our 18-Month Limited Warranty, covering manufacturer defects and workmanship issues under normal use. Built with upgraded premium components and commercial-grade construction, the Bonsai 3×2 FFU is designed for years of reliable operation in mycology and laboratory environments.
Bonus Offer
Buy any Bonsai FFU or Flow Hood and save 50% on compatible accessories and replacement filters.
Accessories must be purchased at the same time for the discount to apply.
Shipping & Returns
- FREE shipping within the continental USA
- Unopened units eligible for return
- Opened units eligible for exchange only
- Shipping damage replacements handled promptly
Product Video
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1795 reviews
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Product Reviews
★★★★★ 5
Great Reading, Mind Opening
Format: Kindle
This is a terrifically interesting and entertaining book, which presented me with at least two blockbuster ideas that changed the way I think about the past. I'll get to those in a minute, but first a few general points. Charles Mann is a science journalist:who seems to specialize in BIG topics. His 2005 book ("1491", which argues that the pre-Columbian population of the Americas was much larger and more sophisticated than generally assumed), was very well received. I enjoyed it so much, and thought it so valuable a book, that I was very anxious to read "1493".
"1493" lived up to my (high) expectations. Mann is remarkable writer, with an extraordinary ability to present very complex facts and ideas in way that's not just accessible to the lay reader, it's fun for the lay reader. This isn't to say that the book isn't carefully researched -- the text is followed by almost 100 pages of footnotes, and throughout he cites and acknowledges the scientists and others from whom he has drawn information. It's just that Mann manages to combine a myriad of facts and hypotheses into a compelling narrative. And he often puts this in very concrete terms, focussing on individual people, commodities or events. It adds up to a fascinating read.
It is also a very important one, with implications for the future as well as about the past. Mann's subject in this book is the Columbian Exchange, the sudden movement of plants, microbes, animals and people between the eastern and western hemispheres after Columbus' voyage to the Americas in 1492. A well known effect of this was the eastern hemisphere adoption of western hemisphere foods (tomatoes, potatoes, chocolate, coffee, and on and on). Another effect that's only been recently come to be widely understood is the devastating impact on the pre-Columbian population of the Americas; as many as 80% died in the epidemics that followed the introduction of diseases to which they had no immunity. But the population die-off and the exchange of plant species are not the only effects of the Columbian Exchange. Mann's book explores the myriad ways in which the Exchange -- globablization -- has shaped the world of today.
Two things I learned from the book struck me particularly. First, like most Americans of my generation (older) I learned in school that the colonization of the Americas was carried out by white people, who moved into a largely uninhabited continent. "1491" took care of the uninhabited: "1493" takes care of the white. Mann says that from 1500 to 1840, about 3.4 million white Europeans emigrated to the Americas. Over the same period, about 11.7 million captive Africans were sent to the Americas. Except for New England, much of the United States and most of Latin American was far more black than white. (And probably in 1840 still more Indian/Native American than anything else). The racial balance changed as white immigration ramped up and as millions upon millions of blacks died too young, but the picture of early America looks very different to me now.
Secondly, Mann discussed at length the 19th century ecological disaster that engulfed China. I had always assumed that the floods that killed so many millions in China had always happened, and were the result of geography. There have indeed always been floods, but their severity and human cost grew logarithmically in the 19th century. New crops led to more food and to rising population growth, and at the same time to more potential cash crops, increasing the pressure on existing land holdings, and leading to vast land clearances. That made the floods far worse when they came, undermining the political structure and compounding China's problems. This was interesting not just a light on the past, but as a warning signal for the future.
The review is already too long, so, to sum it up: Great book!! Read it!! Give it to friends and family!!
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Reviewed in the United States on December 6, 2013
★★★★★ 5
LOVED This Read! Blew Me Away
Format: Hardcover
What a fantastic read! Woah. All of the Americas have an extraordinary history. I was mesmerized from beginning to end. If you like knowing your history, you will love this book. Well researched and smartly written. Couldn't put it down. Books like this are why people love to read. If you think you know the Americas, you might be surprised to find that there's more, and be prepared for a bit of a shake up. This book was a real eye opener.
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Reviewed in the United States on November 18, 2025
★★★★★ 4
A Brave New World
Format: Hardcover
It wasn't quite what I expected, but Charles Mann leads the reader on a fascinating journey in the wake of Columbus, focusing mostly on the environmental impact of his "discovery" of the New World. Mann literally spans the globe, as the establishment of Spanish colonies in the Americas would have far reaching consequences.
Most interesting to me was how silver came to be the currency of exchange, allow Spain to trade with China, when it established its trading outpost in the modern-day Philippines. Along with silver, came corn, rubber and potatoes which would radically alter the landscape of the world. Mann discusses how corn came to replace rice for many Chinese, and how rubber trees would be transplanted to Indochina, bringing with them unsuspected pests that would wreak havoc on ecosystems. In this sense, the book has similarities with Jared Diamond's
but explores different terrain. One of the most interesting chapters was on the highly profitable mining of bird guano and how the British cornered the market in this new fertilizer. Mann describes how the shift to mono-cultures had a tremendous impact on agriculture. At first, these new crops seemed to solve much of the world's food shortages, but then as the Irish famine made all too painfully aware, putting all your "eggs in one basket" can lead to devastating consequences as an unforeseen blight wiped out much of Ireland's food supply.
Mann also offers a long study on how slavery evolved and re-shaped the ethnic identity of many countries, particularly those in Central and South America. The miscegenation that took place, with particular focus on Brazil, reshaped cultural patterns and changed the political dynamics in these countries. He offers a number of intriguing case studies, and discussed the long term impact of this human cross-pollination. 1493 is a fascinating study and meditation on life after Columbus. We don't fully realize how rapidly the world changed after this fateful "discovery," and how continents became so interdependent, where before they had been relatively isolated from each other.
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Reviewed in the United States on April 30, 2012
★★★★★ 5
Great History book
Format: Paperback
This book was a gift for husband. He loves it. He is a slow reader, but he can’t put book down. New and interesting history facts and stories.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Consequence After Consequence
Format: Hardcover
"In Fourteen Hundred Ninety Two, Columbus Sailed The Deep Blue Sea" is a ditty sung by generations of school children. Most of those students learned and believed that Columbus was the only man in Europe who believed the world was round and proved it by sailing three ships west to find the East. In 1493, Charles C. Mann dismisses these legends and goes on to demonstrate that Columbus (or as he refers to him, Colon) and the other Europeans who sailed across the Atlantic in the 1400s and 1500s did far more than just discover a New World, they helped create a planet wide system in which people, plants, animals, and diseases travelled further and were linked in more ways than had ever before been possible. In other words, 1493 was the beginning point of a new age of globalization.
This is not a new theory. Alfred W. Crosby developed the term Columbian Exchange back in the 1970s to describe the changes that took place after 1492. Jared Diamond's Guns, Germs, and Steel and Collapse also detailed some of the consequences of the European "discovery" of the Americas. What makes Mann's new book so appealing is his ability to tell an engrossing story that ably explains how one consequence led to another, fundamentally changing society after society and helping to creat our modern world. This is global history at its best, jumping from Ming and Qing China's opulent but troubled societies to the fast growing but still relatively backwards European states to the myriad African and Native American cultures, all of them to be affected by the transfer of peoples, plants, diseases, and ideas. Mann has a keen eye for an appealing and informative anecdote which really details the consequences of seemingly small decisions, such as how the introduction of the sweet potato to China led to deforestation, or how the Little Ice Age was affected by the abandonment of the Native American practice of burning off underbrush in North American forests.
Its books like 1493, as well as Mann's earlier and equally excellent 1491, which make studying history so fascinating. I taught Advanced Placement World History to high school students for many years before retiring, and I regularly amused them (at least I hope I did) with many references to Jared Diamond and Alfred Crosby's ideas. With 1493 Charles C. Mann deserves equal recognition by global historians.
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Reviewed in the United States on August 19, 2011