AC Infinity Activated Carbon Filter 150 mm

An inline carbon filter with a 150 mm collar, filled with Australian RC412 charcoal in a 38 mm bed. Rated to 410 CFM (700 m³/h).

The 150 mm is the best-selling size, and it usually hangs on a 150 mm fan. That is not automatically the right pairing though, because the two numbers you are comparing do not mean the same thing.

Matching filter to fan

A filter is rated for maximum airflow: how much air can pass through per hour before resistance becomes unacceptable. A fan is rated for free airflow: what it moves with nothing attached. Those are two different kinds of number, and they only tell you something once you put them side by side.

The rule is simple: the filter must never be the bottleneck. Put a 683 m³/h fan behind this 700 m³/h filter and you are fine, because the filter can take more than the fan will ever deliver. The other way round, a large filter on a small fan, is never a problem. It only costs you space.

What does go wrong is too small a filter on a large fan. The fan then has to force air through carbon that is too dense, airflow collapses, the motor sits at a high speed with little coming out, and you will hear it. The answer there is a size up or an XL body, not a higher speed setting.

One more rule of thumb: buy the filter with a little room to spare rather than exactly to size. Carbon that is not working at its limit offers less resistance and lasts longer, and it lets your fan run at a lower and quieter speed.

Hanging it in the tent

This filter weighs around five kilos and in most tents hangs from rope hangers on the top bar, with the fan suspended separately behind it. Do not hang filter and fan from one point: two points share the weight and keep the flanges square to each other, which is what stops air leaking past the joint.

Technical Specifications:

• Model: AC-DCF6
• Collar: 150 mm (6 inch)
• Maximum airflow: 410 CFM (700 m³/h)
• Carbon: Australian RC412, 1200+ IAV
• Carbon bed thickness: 38 mm
• Length: 400 mm
• Weight: approximately 5 kg
• Material: aluminium flanges, coated steel mesh
• Works best: below 55% relative humidity

Frequently asked questions

Does this filter fit the CLOUDLINE Pro S6 or T6?
Yes, and the pairing works on paper too: that fan delivers 683 m³/h and this filter takes 700.

Can I put a larger filter on a smaller fan?
You can, and it works well. It only costs you a bit more room in the tent.

Can it be mounted horizontally?
Yes. Support it properly so the weight does not end up hanging on the ducting or on the fan's flange.