Prima Klima Carbonfilter 800M³

The largest filter in the Eco Line: optimal 800 m³/h, maximum 1150, height 650 mm. The flange here is 160 mm rather than 125.

At the top of the range the connection size changes

Every smaller filter in this line connects at 125 mm. This model steps up to 160, and that is not a detail you can skip past when ordering: your whole exhaust has to follow.

The reason is air speed. A 125 mm pipe passes a certain volume before it starts to hiss and resistance climbs sharply; somewhere around 400 to 500 m³/h that point is reached. At 800 m³/h a 125 mm duct would drive the air so hard that you move more noise than air, and the fan loses much of its capacity to the pipe itself.

Practically that means three things. Your fan must be 160 mm or connected through a reducer, which then becomes the very restriction you were avoiding. Your ducting must be 160 mm along its whole length. And the port in your tent wall has to take the larger flange.

Coming from a 125 mm set-up, expect to replace more than the filter. That is exactly the step at which people leave their installation half renewed.

Technical Specifications:

• Carbon: CTC 55
• Optimal flow: 800 m³/h
• Maximum flow: 1150 m³/h
• Flange diameter: 160 mm
• Height: 650 mm
• Weight: 7.8 kg
• Working life: 11 months active

Frequently asked questions

Can I connect it to 125 mm?
With a reducer, yes, but you then pinch exactly where you need the room. Better to stay at 160.

How heavy is it?
Nearly eight kilos, so hang it from a sound point rather than from tent fabric.

What space does this serve?
At twenty five air changes, around 32 m³.