Systemair RVK - Inline Duct Fans for Grow Room Extraction and Intake
Best for: Growers needing a reliable, quiet inline fan to move air in or out of a grow space, in a size that matches their ducting.
Our thoughts
These have been a grow room staple for years for a reason - they just run, quietly, without drama. With nine sizes covering everything from a small 100mm cupboard grow up to a 315mm commercial-scale room, the harder decision is picking the right size for your setup than trusting the fan itself.
The Systemair RVK range is a line of inline centrifugal duct fans built for moving air through ducting, whether that's extracting hot, stale air out of a grow space or drawing fresh air in. They use backwards-curved impeller blades and an external rotor motor design, which is generally quieter and more efficient than the simple axial fans found in cheaper units.
This listing covers the full RVK range as stocked, running from 4" (100mm) up to 12" (315mm), with some sizes offered in both a standard and an "L" version - the L variants use a longer casing built for higher static pressure or airflow within the same duct diameter, useful if you're running longer duct runs or through carbon filters that add resistance.
How it compares
RVK is Systemair's own long-established inline fan range - it isn't a copy of another brand's design, so there's no "RVK vs RVK" comparison to make here.
- Backwards-curved centrifugal design gives better performance against ducting resistance (filters, bends, long runs) than basic axial inline fans
- Sits alongside other established grow room fan brands such as Vortex and RAM, offering a similar centrifugal-fan approach across a comparable size range
- Wide size range in one family (100mm to 315mm) means you can stay with one trusted fan line as your setup scales up
A dependable, well-known choice across the size range, provided you pick the fan size to match your ducting and filter, not just your tent size.
Usage guidance
Sizing
Match the fan diameter to your ducting size, and size the airflow to your grow space and any carbon filter fitted - filters add resistance, so undersized fans will underperform against their rated figures.
Standard vs L versions
Choose an "L" version where you're running longer duct runs, tighter ducting, or a carbon filter, since the longer casing is built to maintain airflow against extra resistance.
Speed control
All RVK fans can be run through a fan speed controller, which is worth pairing with the fan so you can trim airflow to your actual heat load rather than running flat-out constantly.
Installation
Mount in-line with ducting using the fan's built-in duct clamps, supporting the fan's weight independently of the ducting itself, particularly on the larger sizes.
Technical specifications
- Sizes available: 4" (100mm), 5" (125mm), 5" (125mm) L, 6" (150mm) L, 8" (200mm), 8" (200mm) L, 10" (250mm), 10" (250mm) L, 12" (315mm)
- 100mm rated airflow: approx. 184 m3/h, power approx. 29W, noise approx. 34dB
- 125mm rated airflow: approx. 220 m3/h, power approx. 29W, noise approx. 37dB
- 150mm rated airflow: approx. 428 m3/h, power approx. 59W
- 200mm rated airflow: approx. 796 m3/h, power approx. 104W
- 315mm rated airflow: approx. 1360 m3/h, power approx. 176W, noise approx. 52dB
- Impeller design: Backwards-curved centrifugal blades, external rotor motor
- Speed control: Compatible with standard fan speed controllers
Who this is for
- Growers setting up extraction or intake for a tent or grow room of any size, from a small cupboard grow to a commercial space
- Anyone running a carbon filter or longer duct run who needs the extra headroom an "L" version provides
- Growers who want one trusted fan family they can size up within as their setup grows
Our take
Across every size in this range, the RVK name has earned its place as a grow room standard - quiet running, solid build, and enough size options that you're not stuck compromising between "too small" and "way more than I need". Get the sizing and standard-vs-L choice right and it'll just run in the background for years.
Does exactly what it should, day in, day out, whatever size you land on.
