Can Lite Carbon Filter GT 425 S (150mm Flange)

What is the Can Lite Carbon Filter GT 425 S (150mm Flange) used for?

This filter removes odours and volatile organic compounds (VOCs) from your grow room’s exhaust air. It’s commonly used during flowering or drying stages but can also help with general smells like smoke or cooking. Note: it does not remove humidity or fine particles like mould spores.

Is the Can Lite Carbon Filter GT 425 S used on intake or exhaust?

It's typically used on the exhaust side. Most setups pull air through the filter and out of the grow space to control odour leaks.

What are the key specs and dimensions of this filter?

It features a 150mm flange, 425 m³/h max airflow (around 250 CFM), 200mm outside diameter, 350mm length, 4kg weight, and a 25mm thick carbon bed.

What type of carbon does it use and how is it built?

It uses CKG 48 Australian granulated carbon, with a 25mm bed housed in steel, plus aluminium top/bottom. The 51% open perforation and integrated flange improve airflow and simplify installation. It's assembled in Vancouver, WA.

Does the Can Lite Carbon Filter GT 425 S come with a pre-filter, and why use it?

Yes, it includes a pre-filter sleeve that catches dust and debris before it hits the carbon, extending lifespan and maintaining airflow. It's washable—just dry it completely before reuse.

Where should I install the Can Lite GT 425 S and how should it face?

Mount it high in the grow tent where hot, smelly air rises. Most setups pull air through it (filter → fan → exhaust). It can be mounted inside or outside the tent, horizontally or vertically, with proper support and sealed ducting.

What type of fan works best with this filter?

Use a fan that matches the 150mm flange and has strong static pressure performance. A speed controller helps dial in airflow for better odour control and noise reduction.

How can I improve performance and airflow with this filter?

Avoid running your fan at max speed constantly, keep duct runs short with few bends, maintain negative pressure (tent walls pulling inward), and keep the pre-filter clean.

Why can I still smell odours even with the filter installed?

Common reasons include high fan speed, air leaks before the filter, poor negative pressure, high humidity, or the filter nearing end of life. Seal all joints and monitor airflow.

How long does the Can Lite Carbon Filter GT 425 S last, and how do I extend its life?

Typical lifespan is 12–18 months in good conditions. To extend it, control humidity, clean the pre-filter regularly, avoid overdriving the fan, and keep the grow area dust-free.

What humidity and temperature can this filter handle?

Maximum operating temperature is 80°C, and recommended relative humidity is below 70%. High humidity reduces carbon efficiency and shortens lifespan.

Can I recharge, wash, or reuse the carbon inside?

No, the carbon inside is not washable or rechargeable. Once performance drops and odours return, replacement is the only reliable option.

Is the Can Lite 425 S the same as GT 425 S or Can-Lite Steel 425?

Yes—these are naming variations for the same core product. As long as specs like 150mm flange and 425 m³/h rating match, it's the correct filter.

Why is there noise or whistling after installing the filter?

Noises often come from turbulence, crushed ducting, reducers, or loose fittings. Try smoothing airflow paths and securing all ducting tightly.