Air Filtration for Grow Rooms & Indoor Farming

In controlled grow environments, mold, powdery mildew, and dust can quietly compromise plant health, reduce yields, and threaten entire harvest cycles.

A grow room is a closed loop. The same air passes over your canopy again and again, and anything suspended in it — spores, dust, dander carried in on clothing — keeps circulating until something removes it.

CleanLeaf systems continuously filter fine particulates and biological contaminants while supporting balanced airflow, helping you maintain a stable growing environment that protects plant vitality and maximizes yield potential.

With proper unit placement, our systems exchange the air in your room 8-10 times per hour — reducing particulate by up to 99.7% with every pass until your space is performing at its best.

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8-10x

Air exchanges per hour

99.97%

HEPA capture at 0.3 micron

<$200

Est. annual filter cost

Real-world results

Case Study

Grow Facility Air Quality Results

Lab testing compared CleanLeaf filtration against HVAC-only and PCO systems in an active grow facility. See the fungal spore counts.

Explore the results

What's Circulating in Your Grow Room

Four airborne threats show up in nearly every indoor grow. Each one calls for a different filtration stage.

Biological

Powdery Mildew Spores

Spores travel on air currents and settle on leaf surfaces long before visible symptoms appear. Once they establish in a room, every cycle is exposed.

Biological

Mold & Botrytis

Dense canopies and high humidity give mold a foothold. Airborne spores spread from a single affected plant to the rest of the room.

Particulate

Dust & Growing Media

Media handling, transplanting, and foot traffic put fine dust into the air. It settles on leaves, blocks light, and carries contaminants with it.

Odor & VOC

Terpenes & Plant Odor

Flowering plants release strong aromatic compounds. Where odor leaves the building, it becomes a neighbor and compliance issue.

Why placement matters

Spore control is a numbers game. A room at 8-10 air changes per hour cleans the same air repeatedly, driving airborne counts down and keeping them there — rather than removing contaminants once and letting them rebuild between cycles.

How It Works

CleanLeaf grow room air cleaners hang from the ceiling and run independently of your HVAC — no ductwork, and no loss of heating, cooling, or humidity control.

Units work together to create a circular air pattern through the canopy zone, much like supply and return vents in an HVAC system. As air passes through the high-efficiency filter media, particulate is captured and the cleaned air is handed off to the next unit, which reduces it further.

This cycle continues until the room reaches a clean air standard, with the air exchanging up to 8-10 times per hour depending on your configuration.

For rooms where spores are the primary concern, HEPA configurations capture 99.97% of particles at 0.3 microns — well below the size of common fungal spores. Where odor also needs managing, carbon and HEPA stages can be combined in a single unit.

Placement makes the difference. Units positioned in opposite corners create a continuous circular airflow pattern, maximizing coverage and ensuring the same air is cleaned multiple times. Key factors include room size and ceiling height, canopy density, contaminant type, and your target air quality standard.

Each unit has a specific catch and throw distance that determines optimal spacing. Our team can help you design the right configuration for your rooms.

No Ductwork Quiet Operation Easy Plug-n-Play Low Maintenance Runs Alongside HVAC

Air Cycle — Per Pass Through the System

Room Air

→ Air Enters the System

↓ Stage 1 — Pre-Filter

Stage 1

Dust & large particles captured

↓ Stage 2 — Primary Filter

Stage 2

HEPA captures spores & fine particulate

↓ Stage 3 — Carbon Stage

Stage 3

Terpene odor neutralized (if equipped)

↓ Filtered air returned to canopy

Clean Air

✓ Filtered air returned to room

Units cycle air up to 8-10× per hour — working together to clean the same air repeatedly. Units hung in opposite corners maximize circulation coverage across the full canopy.

Recommended Systems for Grow Rooms

Choose based on your primary air quality challenge and room size. All models use standard-sized high-efficiency filters to keep running costs low.

Bacteria, Mold & Mildew

For grow rooms where spores and biological contaminants are the primary concern — the most common starting point for indoor farming.

Single Rooms

OX1100-HE

825 CFM

Bacteria, Mold, Mildew

OX1100-HE

HEPA-led build for spore and fine particle control in individual grow rooms.

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OX1100-HE — Spore & Pathogen Control, Single Rooms Most Popular for Grows

The standard choice for a single flower or veg room. A HEPA stage captures 99.97% of particles at 0.3 microns — smaller than powdery mildew and botrytis spores — while a washable foam pre-filter takes out dust and media debris before it reaches the HEPA media, extending filter life.

Filter Specifications

20×15×1" 35% Washable Foam Pre-Filter 95% (ASHRAE) Pocket Bag Filter HEPA Final Filter — 99.97% @ 0.3µ

Airflow: 825 CFM · Sound: 48 dBA @ 5' Shop OX1100-HE

Large Rooms

OX2500D-HE

2,000 CFM

Bacteria, Mold, Mildew

OX2500D-HE

High-volume HEPA platform for large flower rooms and open warehouse grows.

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OX2500D-HE — Spore & Pathogen Control, Large Rooms

When a single OX1100-HE can't reach your target air changes, the OX2500D-HE delivers more than twice the airflow with the same HEPA-grade capture. Built for large flower rooms, converted warehouse grows, and multi-tier vertical farms where a high canopy volume needs continuous spore control.

Filter Specifications

Washable Foam Pre-Filter 95% (ASHRAE) High-Capacity Bag Filter HEPA Final Filter — 99.97% @ 0.3µ

Airflow: 2,000 CFM · Sound: 48 dBA @ 5' Shop OX2500D-HE

Spores & Odor Combined

For flower rooms and facilities that need both biological control and terpene odor management from a single unit.

Single Rooms

CL1250D-CCPHE

1,000 CFM

Mold & Mildew Odor

CL1250D-CCPHE

Compact carbon + HEPA unit handling spores and odor in one ductable package.

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CL1250D-CCPHE — Spores & Odor, Single Rooms

Flower rooms rarely have just one problem. This configuration stacks a carbon stage ahead of HEPA media, so terpene odor and airborne spores are handled in the same pass. The ductable form factor gives you placement flexibility in tight rooms with fixed light layouts.

Filter Specifications

Pleated Pre-Filter Carbon Canister Stage HEPA Final Filter — 99.97% @ 0.3µ

Airflow: 1,000 CFM · Ductable: Yes Shop CL1250D-CCPHE

Large Rooms

CL2500D-CCPHE

2,000 CFM

Mold & Mildew Odor

CL2500D-CCPHE

Carbon + HEPA at high airflow for large flower rooms and whole-facility coverage.

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CL2500D-CCPHE — Spores & Odor, Large Rooms

The same combined carbon and HEPA approach scaled up for large flower rooms and multi-room facilities. Where odor control is a licensing or neighbor requirement and spore counts still have to stay low, this unit covers both at high volume.

Filter Specifications

Pleated Pre-Filter High-Capacity Carbon Stage HEPA Final Filter — 99.97% @ 0.3µ

Airflow: 2,000 CFM · Ductable: Yes Shop CL2500D-CCPHE

Dust & Particulate

For veg rooms, propagation areas, and media handling spaces where dust — not spores or odor — is the main issue.

Small–Medium Rooms

OX1100

950–1,100 CFM

Dust & Particulate

OX1100

Maximum bag filter capacity for dust-heavy areas with no spore or odor concern.

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OX1100 — Dust & Particulate, Small–Medium Rooms

Propagation rooms, media mixing areas, and dry rooms generate dust without the spore pressure of a flowering canopy. With no HEPA or carbon stage taking up space, the OX1100 devotes maximum filter area to particulate capture — the most cost-effective option where dust is the whole problem.

Filter Specifications

20×15×1" 35% Washable Foam Pre-Filter 20×15×24" 95% (ASHRAE) 6 Pocket Bag Filter

Airflow: 950–1,100 CFM · Sound: 48 dBA @ 5' Shop OX1100

Explore All Air Filtration Solutions

Quick Answers to Common Questions

Find quick answers to the most common questions about our services, solutions, and process.

See All FAQs

Air filtration system selection depends on:
• Room size (cubic footage)
• Air changes per hour (ACH)
• Type of contaminants (dust, smoke, mold, odors, VOCs)
• Required filtration level (bag filter %, carbon weight, HEPA, etc.)

Our team evaluates airflow dynamics and contaminant load to recommend a properly sized solution — not just a box with a fan.

Most CleanLeaf and Blue Ox models operate between ~48–66 dBA, depending on airflow setting and unit size.

Lower-speed settings and optional silencers are available for sound-sensitive environments.

Most units are plug-and-play on standard 115V power and include suspension or bracket mounting options.

For larger commercial or industrial applications, we may recommend airflow planning to optimize circulation patterns.

Filter life varies by environment and contaminant load. Typical ranges:
• Pre-filters: 1–3 months
• Carbon media: 6–12 months
• HEPA or high-efficiency bags: 6–18 months

Higher particulate or odor loads may shorten intervals.

Our systems are engineered to capture and control:
• Dust
• Smoke
• Mold and Mildew
• Odors and VOCs
• Fine particulate

Filtration stages may include pleated pre-filters, high-efficiency bag filters, HEPA media, and activated carbon depending on the application.

CleanLeaf offers a 2-year warranty covering defects in materials and workmanship for authorized distributors and end users.

To make a claim, you must get approval first. Approved claims are resolved with a replacement or credit/refund. The warranty is void if the product was misused or used outside its intended purpose.

We also provide ongoing support and access to replacement filters.

Product or System Quote Request

If you would like to speak with one of our product experts about our products, pricing, or to get a system estimate, please call or email us using the contact information below. If you want pricing for a specific product or would like to be contacted by a product expert, please use the Request a Quote Form. If you need support with an existing order, please visit the Contact Us page.

Request a Quote

Please share a few details below, and a product expert will contact you promptly. To accelerate the process, please provide as much detail about our application as possible (EX: type of contaminant (dust, odor, fumes...), size of your space, ceiling height...).

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Air Filtration for Grow Rooms & Indoor Farming