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Carbonfilter

Activated carbon filters for odour-free indoor growing

How does a carbon filter keep your grow room discreet? Activated carbon with a high CTC rating adsorbs odour molecules from exhausted air, while also removing volatile organic compounds that affect plant health. The result is clean, odour-free exhaust — essential for growers in urban areas across Belgium and beyond.

Our Can-Lite filter range spans 150 to 1500 m³/h and includes replaceable pre-filters that extend the carbon's effective lifespan. For best performance, pair your filter with an extractor rated roughly 20 % above the filter's capacity. Fast and discreet delivery throughout Belgium.

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Can-Filters Plastic Flange 100mm carbon filter connection piece | Carbonfilter

Can-Filters - Flange Plastic 100mm

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Can-Filters - Flange Plastic 125 mm

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Can-Lite 150

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Can-Lite 300

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Can-Lite 425

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Can-Lite 600

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Can-Lite 800

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Can-Lite 1000

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Can-Lite 1500

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Pre Filter Can-Lite 150

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Pre Filter Can-Lite 425

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Our carbon filter range

At Plant & Flower, your Belgian grow shop since 2011, we stock a complete range of carbon filters from Can-Lite and Can-Filter for reliable odour control in indoor cultivation. These filters adsorb odour molecules through activated carbon with a high CTC rating, keeping your grow tent discreet while also improving air quality. For a properly balanced ventilation system, pair your filter with an extractor rated roughly 20 % above the filter's capacity.

How a carbon filter works

A carbon filter operates on the principle of adsorption: odour molecules attach themselves to the surface of activated carbon. This carbon possesses an enormous surface area thanks to its porous structure — one gram reaches 500 to 1500 m² of active surface. When exhausted air flows through the filter, odour particles remain trapped while clean air exits your space. The benefits extend beyond simple odour control: carbon filters also remove volatile organic compounds (VOCs) and improve overall air quality, creating a healthier environment for your plants.

Technical specifications that matter

CTC value 40-60 %: indicates the quality and absorption capacity of the activated carbon
Capacity 150-1500 m³/h: match to your extractor (filter 20 % larger recommended)
Washable pre-filter: extends main filter lifespan by 30-50 %
Standard diameters: 100, 125, 150, 200, 250 and 315 mm to fit your ducting
Noise reduction up to 10 dB through vibration absorption in the carbon layer
Lifespan: 12-24 months depending on usage and odour load

Choosing the right filter for your setup

The sizing rule is simple: multiply your room volume (L × W × H in m³) by 60 to get required airflow in m³/h, then add 20 % margin. For a 1 × 1 m tent (1.5 m³), the Can-Lite 150 with 400-600 m³/h capacity fits perfectly. For a 1.2 × 1.2 m tent, choose the Can-Lite 425. Mid-range setups benefit from the Can-Lite 300. For 2.4 × 2.4 m tents, the Can-Lite 800 delivers 800-1200 m³/h. During intensive flowering, the Can-Lite 1500 covers the largest installations. Don't forget the Can-Lite 150 pre-filter to protect your investment.

Push or pull configuration

Pull configuration (filter before extractor) delivers the best odour control because your system operates under negative pressure — the fan draws air through the filter, preventing any unfiltered air from escaping through leaks. This is the recommended choice for grow tents. Push configuration (fan before filter) is more energy-efficient but requires a completely airtight room. Mount the filter horizontally at the ceiling with rubber vibration dampeners to minimise noise transfer, and use aluminium tape on all connections. Optionally combine with a variable speed extractor that reduces airflow during less odour-intensive periods.

FAQ - Frequently asked questions about carbon filters

What size carbon filter do I need for my grow room?

Calculate your room volume in m³ (L × W × H), multiply by 60 for minimum airflow per hour, then add 20 % margin. For a 1.2 × 1.2 × 2 m grow tent (2.88 m³), a 150 mm filter with 400-600 m³/h suffices. When in doubt, choose one size larger — oversized filters work more efficiently and last longer.

What does the CTC value mean?

The CTC value (Carbon Tetrachloride) measures the absorption capacity of activated carbon. Values between 40 and 60 % indicate high-quality carbon. Premium brands like Can-Filter use 50-60 % CTC carbon that absorbs up to 3 times more odours than cheap alternatives.

How long does a carbon filter last?

On average 12-24 months depending on usage. Continuous cultivation with high odour production shortens lifespan to 12-15 months, while seasonal growers often reach 20-24 months. Regular pre-filter cleaning significantly extends the main filter's lifespan.

Filter before or after the extractor?

Pull configuration (filter before extractor) is the recommended setup: the system operates under negative pressure, preventing any unfiltered air from escaping. This is the standard solution for grow tents, chosen by the vast majority of professional growers.

Can I wash and reuse a pre-filter?

Yes, washable pre-filters can be cleaned every 4-6 weeks with cold water without detergent, or vacuumed gently. Allow to dry completely before replacing. A well-maintained pre-filter extends main filter lifespan by 30-50 %. Replace after 8-12 washes when the fabric becomes worn.

How do I prevent leaks in the system?

Use aluminium tape and hose clamps on all connections. Test after installation with smoke sticks: smoke reveals invisible leaks. Every leak drastically reduces efficiency because unfiltered air escapes and bypasses the carbon.

Browse our complete range of Can-Lite and Can-Filter carbon filters at Plant & Flower, with fast delivery throughout Belgium. Our team gladly advises on properly sizing your system based on your tent and extractor.