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Prima Klima 2 Speed 420-800 m³/h
The Prima Klima 2 Speed 420-800 m³/h is a centrifugal inline fan with a Ø 160 mm flange and two fixed settings. It moves 420 m³/h on low and 800 m³/h on high, switched by a toggle on the housing rather than by an external unit. Power draw is 108 W. The ebm-papst motor uses two separate windings, which makes the fan incompatible with dimmers, variispeed units and any other voltage-based speed controller. Sealed ball bearings, a backward-curved impeller and a flame-retardant polyamide housing suit it to continuous operation in larger grow rooms. Both speeds are built in, so no separate controller is needed, and the Ø 160 mm flange takes ducting and carbon filters of the same size.
Prima Klima 2 Speed 420-800 m³/h – dual-speed inline extractor with Ø 160 mm flange
The Prima Klima 2 Speed 420-800 m³/h (model PK160-2) is a centrifugal inline fan with a Ø 160 mm flange and two fixed settings: 420 m³/h on low and 800 m³/h on high. It draws 108 W at full speed and is built for grow rooms that have outgrown a Ø 125 mm extractor. Speed selection is made on the housing itself.
Technical specifications
| Airflow, low setting | 420 m³/h |
|---|---|
| Airflow, high setting | 800 m³/h |
| Flange diameter | 160 mm |
| Power draw | 108 W |
| Supply | 230 V, 50/60 Hz, 0.47 A |
| Max. air temperature | 50 °C |
| Dimensions (w × h) | 340 × 232 mm |
| Weight | 3.3 kg |
| Motor | ebm-papst AC, ball bearings, backward-curved impeller |
| Housing | impact-resistant, flame-retardant polyamide |
Dual windings, and why the fan cannot be dimmed
The ebm-papst motor carries two independent windings, each wound for its own speed. Whichever setting is selected, the motor runs at its design point. A single-winding motor slowed by voltage reduction does the opposite: it operates outside its nominal range, which produces hum, lowers efficiency and shortens bearing life. The trade-off is a firm one. This fan must not be connected to a dimmer, variispeed controller or any AC voltage regulator, as the integrated toggle is the only sanctioned method of speed selection and external regulation can damage the windings. Where automatic, temperature-led extraction is required, the thermostat-controlled Prima Klima is the model designed for it.
Ducting, filtration and static pressure
The 160 mm flange takes ducting of the same nominal size; 163 mm aluminium ducting slides straight over it and clamps in place. Specify a carbon filter rated at or above the high setting so that filtration does not become the restriction in the system — the Can-Lite 800 is the matching option. The backward-curved impeller develops more static pressure than an axial design, which is what keeps usable airflow through a filter and along an extended duct run. Ball bearings are sealed and maintenance-free, and the polyamide housing mounts in any orientation. Every bend and every metre of ducting adds resistance, so the shorter and straighter the run, the closer actual throughput stays to the rated figures. Maximum permissible air temperature through the unit is 50 °C, comfortably above what a lit grow room exhausts.
Which setups this model suits
- Larger grow rooms where a Ø 125 mm extractor would sit permanently at full output
- Multi-lamp setups or a 600 W HPS, where peak thermal load is the limiting factor
- Seasonal running: the low setting for winter and dark periods, the high setting for summer peaks
- Installations without a separate controller, since both speeds are built into the unit
For a smaller footprint, the Prima Klima 2 Speed 220-360 m³/h applies the same dual-speed principle in a Ø 125 mm format.
Shipped from Belgium throughout the Benelux; matching filters, ducting and brackets are listed alongside this fan at plantandflower.be.
Can this extractor run on a dimmer or variispeed controller?
No. The motor uses two separate windings selected by an integrated toggle. A dimmer, variispeed unit or AC controller reduces voltage to a winding that was never designed for it, causing hum, efficiency loss and possible damage. If automatic speed regulation is the requirement, a thermostat-controlled model is the appropriate choice.
How does it compare with the 220-360 m³/h model?
Flange size and airflow separate them. The 220-360 connects at Ø 125 mm, whereas the Prima Klima 2 Speed 420-800 m³/h has a Ø 160 mm flange and delivers more than double the airflow on its high setting. Both share the dual-winding design, so neither can be run through an external speed controller.
What duct diameter does it need?
The flange measures 160 mm, so the duct run is sized to match. Aluminium ducting of 163 mm fits directly over the flange and is secured with a clamp. Where the carbon filter uses a different connection size, fit the widest practical reducer to keep pressure loss to a minimum across the system.
How much power does the fan consume?
Rated power draw is 108 W, from a 230 V supply at 0.47 A. That figure applies to the high setting; on low, consumption falls because a slower winding takes over. Maximum permissible air temperature through the fan is 50 °C, which comfortably covers extraction from a lit grow room.
