Go-To Guide for HEPA in Grow Rooms


HEPA, high-efficiency particulate air filtration, captures airborne contaminants, micro-organisms, and other particulates to protect sterile environments such as grow rooms. There are a lot of questions and speculation surrounding HEPA air filters in grow rooms, but when it comes to the safest, most effective solution for air purification HEPA truly is the best.

Because HEPA air filtration is so effective, it has become the standard for applications requiring the ultimate in clean air. Installing HEPA grow room air cleaners ensures that smoke, mold spores, bacteria, and other sub-micron particles are captured and filtered.

In an effort to provide growers with accurate information about HEPA filters, we've created this guide to clear up answers to some of the most commonly asked questions.

Three CleanLeaf air scrubbers hanging in a grow facility.

Will HEPA filters remove mold spores?
No. If plants are infected before implementing a HEPA filter it will not remove mold. HEPA filters prevent mold and should be established before starting the growing process.

Will a HEPA filter remove smells?
In short, yes but not efficiently. If odors are your main concern you're going to want a carbon filter. HEPA filters focus on overall air quality vs. odor control.

Can HEPA filters be washed and reused?
There are HEPA models that claim to be washable, however, there are a few important things to note:

• If you wash HEPA grow room filters they will fall apart
• There is no confirmation that these washable filters work after being cleaned
• Removing and cleaning a HEPA filter in or near a growing area is a serious risk of contamination

When should HEPA filters be changed?
In normal grow room environments, HEPA filters can last up to 2 years. In commercial environments, HEPA filters should be checked every 6 months and changed at least once every two years.

HEPA vs MERV
The MERV rating ranges between 1 and 16 and is based on how small of particles a filter can collect. The higher the MERV rating the better the quality of the filter.

• Low MERV: 1-4
• Medium MERV: 5-13
• High-Efficiency MERV: 13-16 (collects particles as small as 0.3 microns @ 75% efficiency)

HEPA air filters range from 17-20 MERV which is why they are used in hospitals and other surgical-grade clean environments.

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CleanLeaf 2500D HEPA Air Scrubber

It's important to note that while HEPA air filtration systems are excellent for air purification, that doesn't mean they are the best solution for you.

The design of CleanLeaf grow room air scrubbers varies based on the series. Our Clean Room Series features a 99.99% efficient high capacity V-Bank HEPA filter to capture even the smallest contaminants. The V-shaped channels increase the surface area that air comes into contact with, without sacrificing airflow.

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