Headwind HVC Carbon Filters (All Sizes)

What do Headwind HVC Carbon Filters actually remove?

They remove strong odours and VOCs from exhaust air — especially grow smells like terpenes. They won’t remove humidity or function as air purifiers, but in a sealed setup with the right airflow, they’re highly effective at neutralising smell.

Which size Headwind HVC Carbon Filter should I choose?

Match the flange size (100–315mm) to your ducting and fan, then check the filter’s airflow rating against your fan’s actual performance after bends/restrictions. Larger filters support higher airflow but are heavier and need more space.

Do Headwind HVC Carbon Filters work with all fan types?

Yes — they’re compatible with centrifugal, mixed-flow, silenced, and EC fans. EC fans are especially ideal, since you can dial in the exact speed for optimal odour control and noise levels.

Why is fan speed and negative pressure important?

If air moves too fast through the filter, odour molecules don’t get absorbed properly. Negative pressure keeps smells from leaking out of gaps, forcing all air through the carbon filter for maximum effectiveness.

How should I install a Headwind HVC Carbon Filter?

Mount the filter near the top of your grow tent or room, where warm air rises. Use clamps and foil tape to seal duct joins, and keep ducting as short and straight as possible to maintain airflow.

Can I mount it horizontally or outside the tent?

Yes — just make sure the filter is fully supported, and any ducting before the filter is airtight. Filters can also scrub air inside a room in recirculating setups, but exhausting is usually more effective.

Do Headwind HVC Carbon Filters need pre-filters?

Yes. Each filter comes with two Velcro pre-filters, and they’re essential for catching dust and extending carbon life. Clean or replace them regularly to maintain airflow and performance.

How often should I clean the pre-filters?

Whenever they look dusty or if airflow drops. In clean environments, this might be monthly — in dusty garages or sheds, you might need to clean them weekly. Always dry them fully before reinstalling.

How long do Headwind HVC Carbon Filters last?

Filter life depends on humidity, odour load, and how clean your setup is. In ideal conditions, they can last a long time. Signs of wear include smell returning, reduced effectiveness, or needing higher fan speeds.

Can I wash or recharge the carbon inside?

No — once the carbon is saturated, it needs to be replaced. Washing damages the carbon, and recharging requires industrial equipment not suited to home use.

Why am I still smelling odour with the filter installed?

Common issues include duct leaks before the filter, running the fan too fast, high humidity, or the filter nearing end-of-life. Also check for poor sealing around zips, ports, or intake gaps.

Do Headwind HVC Carbon Filters work during drying or flowering?

Yes — those stages produce the strongest odours, and the filters are designed to handle them. Just keep humidity controlled and avoid overspeeding the fan to get the best results.

Can I run the filter 24/7 or just during lights-on?

You can do either. Running it 24/7 is common for maximum smell control. If you only need odour control at certain times, use a controller — just remember smells don’t always follow light schedules.

What’s the best way to store a spare filter?

Keep it sealed in its packaging (or airtight plastic) in a cool, dry place. Carbon can absorb moisture and household smells even when not in use, which reduces its effectiveness once installed.

What are the top tips for getting the best performance?

Seal all ducting joins, maintain negative pressure, control humidity, clean pre-filters often, avoid sharp bends in ducting, and don’t blast the fan faster than the filter can handle.