Bonsai 4 x 2 ft 99.99% HEPA Flowhood Fan Filter Unit (FFU) 120V
Bonsai 4 x 2 ft 99.99% HEPA Flowhood Fan Filter Unit (FFU) 120V is backordered and will ship as soon as it is back in stock.
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Description
Description
The Bonsai 4' × 2' HEPA Fan Filter Unit (FFU) is the largest unit in our FFU lineup — the widest clean-air work area we make, and enough airflow to pressurize a clean room or grow space with HEPA-filtered air.
It pushes air through a true H14 HEPA filter rated 99.995% at 0.3 microns for ISO Class 5 / Class 100 clean air. Every Bonsai FFU uses a backward-curved aluminum blower, a 20-gauge powder-coated housing and a washable magnetic pre-filter, and plugs into a standard 120V outlet.
- 4'×2'Filter face
- 99.995%@ 0.3 microns
- 160 FPMHigh speed
- 88 lbsWeight
- 18 monthsWarranty
Why growers pick Bonsai FFUs
- True H14 HEPA – Rated 99.995% efficiency at 0.3 microns for ISO Class 5 / Class 100 clean air.
- Largest work area – A 4' wide filter face — room for high-volume agar pours, grain transfers and inoculation.
- Aluminum blower – A backward-curved aluminum centrifugal wheel instead of the plastic blowers used in many low-cost FFUs.
- Washable pre-filter – The magnetic electrostatic pre-filter catches larger particles first and rinses clean, extending HEPA filter life.
- Compact 14" depth – Sits on a standard table or bench.
- 3-speed control – Set the airflow to match your technique and workload.
FFU or full laminar flow hood? For most home growers an FFU works as a complete flow hood solution. Our flow hood vs FFU guide compares both side by side.
What you can do with it
- Pour and transfer agar plates
- Inoculate grain jars, spawn bags and substrate
- Work with liquid culture, cloning and syringe prep
- Build a dedicated clean-air workstation
- Pressurize a clean room or grow space with HEPA-filtered air
- Upgrade from a still air box to HEPA-filtered airflow
How to set it up
- Place it. Set the FFU on a sturdy table or bench with the filter face toward your work area.
- Plug it in. Use a standard grounded 110/120V outlet — no special wiring.
- Let it run. Turn it on and let it run before you start so the work area fills with filtered air.
- Work in the airflow. Keep plates, jars and bags between the filter face and your hands, and don’t reach over open plates.
- Maintain it. Rinse the magnetic pre-filter periodically and keep a replacement HEPA filter on hand.
Compare Bonsai FFU sizes
| Model | Filter face | Dimensions | Weight | High / med / low |
|---|---|---|---|---|
| 2×2 FFU | 2' × 2' | 25" W × 25" H × 14" D | 37 lbs | 120 / 110 / 100 FPM |
| 3×2 FFU | 3' × 2' | 38" W × 26" H × 14" D | 67 lbs | 120 / 110 / 100 FPM |
| 4×2 FFU | 4' × 2' | 49" W × 26" H × 14" D | 88 lbs | 160 / 120 / 95 FPM |
Specifications
| Specification | Detail |
|---|---|
| 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 an aluminum frame |
| Pre-filter | Washable magnetic electrostatic pre-filter (MERV 5 / G4, 95% at 5µm) |
| Fan control | 3-speed adjustable |
| Airflow | High 160 FPM · Medium 120 FPM · Low 95 FPM |
| Blower | Backward-curved aluminum centrifugal |
| Housing | 20-gauge powder-coated, with pull handles |
| Power | Standard 110/120V grounded plug; approx. 250W at 100 FPM |
| Noise | Approx. 50–60 dBA |
| Resistance | 0.327–0.682 IWG |
| Dimensions | 49" W × 26" H × 14" D |
| Weight | 88 lbs |
| Warranty | 18-month limited warranty |
| Shipping | Free freight shipping within the continental USA, on a pallet |
Who it’s best for
- High-volume sterile work and production labs
- Commercial grow rooms and small facilities
- Clean room builds and room pressurization
- Anyone who wants the most working area in our FFU lineup
Keep a spare filterHEPA filters load up over time. The replacement H14 HEPA filter for this FFU drops right in.
See it in action
FAQ
Can an FFU replace a laminar flow hood?
For most home growers, yes. It gives you HEPA-filtered airflow over your work area for agar, liquid culture and inoculation. Our flow hood vs FFU guide covers where each one fits best.
What HEPA filter does it use?
A true H14 HEPA filter rated 99.995% efficient at 0.3 microns, for ISO Class 5 / Class 100 clean air.
Does it need special wiring?
No. It plugs into a standard grounded 110/120V outlet.
How loud is it?
About 50–60 dBA, roughly like a window air conditioner.
How do I maintain it?
Rinse the washable magnetic pre-filter periodically. It catches larger particles so the HEPA filter lasts longer, and a replacement HEPA filter is available when you need one.
What is the warranty and return policy?
Every Bonsai FFU has an 18-month limited warranty covering manufacturer defects and workmanship under normal use. Unopened units can be returned; opened units are eligible for exchange only. Shipping damage is handled promptly.
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