Bonsai Flow Hood H14 99.995% HEPA Replacement Filter for 2'x4' Commercial Flow Hood

The Bonsai HEPAFLOW-C 2’ × 4’ HEPA replacement filter keeps your Bonsai Commercial Series flow hood delivering clean, filtered air. It’s a 24" × 48" × 6" deep true H14 HEPA filter in an aluminum frame, rated 99.995% efficient at 0.3 microns.

Plan on replacing it about every 24 months for typical hobby use, or every 12–18 months in a busy lab. Dusty, high-particulate workspaces can shorten that, so replace it before airflow or sterility drop off.

• True H14 HEPA
• 24" × 48"
• 6" deep
• Aluminum frame

• 2’ × 4’Filter face
• 99.995%@ 0.3 microns
• 6"Depth
• ~24 moHobby use
• 0.8"Resistance

Why replace with a genuine Bonsai filter

• Exact fit – Made for the Bonsai Commercial Series 48" × 24" flow hood.
• True H14 HEPA – 99.995% filtration at 0.3 microns for a clean work area.
• Consistent airflow – 0.8" resistance keeps airflow steady across the filter face.
• Long service life – Plan on about 24 months of typical hobby use, and longer with very light use as long as it keeps passing your tests.
• Durable build – All-aluminum frame, 6" deep.

When to replace it

• Around 24 months for typical hobby use, or 12–18 months in a busy lab
• Any time it fails an agar plate test
• Sooner in dusty or high-particulate workspaces
• When airflow at the filter face noticeably drops
• If you see more contamination in work done in front of the hood

How to replace it

1. Power down. Turn off and unplug the flow hood.
2. Remove the old filter. Take out the used filter, handling it carefully to avoid releasing trapped particles.
3. Install the new filter. Seat the new filter evenly in the hood so it seals around the edges, with the airflow direction matching the hood.
4. Run before use. Turn the hood on and let it run before starting sterile work.

Specifications

HEPA filter replacement chart

There's no single expiry date for a HEPA filter. It wears out two ways: dust loading, which tracks run hours and how clean your room is, and aging of the media and gasket seals, which tracks the calendar. Plan on about 24 months for typical hobby use and 12–18 months in a busy lab. Keep it in service as long as it passes an agar plate test and holds its airflow, and replace it sooner if it doesn't.

Our HEPA filter replacement guide explains each row of the chart and walks through four simple tests (agar plates, a flame test, an anemometer reading and a pre-filter check) that tell you when your filter is actually done.

FAQ

• Laminar flow hoods
• Commercial 4×2 flow hood
• Flow hood vs FFU guide