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Variator Variispeed
The Variispeed Variator is an analog plug-in speed controller that lets you adjust the RPM of your grow extractor fan simply and smoothly. No installation required — plug the Variispeed into a standard wall socket and connect your fan to the device. Turn the knob to reduce speed: immediate noise reduction, lower power consumption and better temperature control in your grow tent. Compatible with most AC fans in the hobbyist segment, including duct extractors and axial fans like the Vents Quietline range. The ideal accessory for growers who need less ventilation during off-peak hours. A small investment with significant impact on operational comfort and energy costs.
Variispeed Variator — Analog Speed Controller for Grow Extractor Fans
The Variispeed Variator is an analog plug-in speed controller that lets you adjust the RPM of your grow extractor fan in one fluid motion — no tools, no wiring, no installation. Plug it into a wall socket, connect your fan to the Variispeed, and turn the knob. An essential accessory from the climate control range at Plant and Flower for growers seeking finer control over their extraction system.
Why a Speed Controller Is a Game-Changer for Grow Tents
Most extractor fans are sized for peak demand: typically the hottest hours mid-flowering at full lighting capacity. However, your tent does not always need 100% ventilation capacity. At night when lights are off, or during early vegetative growth when plants are small and heat production minimal, a fan running at full RPM is unnecessarily aggressive. A speed controller solves this: reduce RPM by 30-50% and you immediately notice differences in three domains — noise output drops dramatically, power consumption can halve, and tent temperature remains more stable because you are not pulling in unnecessary cool air. For a European grower with a Vents Quietline Ø 100 or stronger extractor, this translates to measurable operational cost savings.
- Plug-and-play design: no installation required — plug in and start controlling immediately.
- Smooth speed adjustment: turn the knob for fluid regulation from low to high RPM ranges.
- Noise reduction: 30-50% RPM drop means significantly quieter operation, critical in shared living spaces.
- Energy savings: at reduced RPM, power draw drops quadratically — half-speed uses substantially less electricity.
- Universal compatibility: works with most AC fans including duct extractors and axial designs.
Analog vs Electronic: What Is the Difference?
The Variispeed is a thyristor-based analog variator — simple, reliable, and cost-effective. For those seeking more functionality, the electronic Cli-Mate Fan Speed Controller offers pre-programmed speed curves and digital precision. Both products perform the same core function (RPM control) but differ in user experience and advanced features. The Variispeed is the right choice for growers wanting simple, reliable control without digital menus. It particularly suits growers who adjust their RPM manually based on tent temperature observation rather than automated schedules.
Practical Operating Guidance
Always start at maximum RPM when bringing your tent online, especially during the first hours to fully refresh the air. After several hours of operation, dial down the Variispeed until you find the balance between temperature control and noise output. A typical continuous-flowering setting falls between 60% and 80% of maximum. At night (lights off), dial further down to 30-40% for additional energy savings. Note: at very low RPM, some fans may vibrate or hum — raise back to a stable value if this occurs. For stronger extractors like the Vents Quietline Ø 150, the controller impact on your energy budget becomes even more substantial.
Order your Variispeed Variator from Plant and Flower with fast shipping across Belgium. The simplest way to upgrade your existing extraction system into smarter climate management.
Will the Variispeed work with my specific extractor fan?
The Variispeed works with most AC fans in the hobbyist grow segment — duct extractors, axial fans, and most centrifugal models up to approximately 2 amps. It does not work with DC fans or modern EC motors that have their own electronic speed regulation built in (such as high-end Prima Klima EC models). Check your fan label: if marked "AC motor" or rated under 2A, the Variispeed is compatible. When in doubt, consult your fan datasheet.
How much can I save on my energy bill?
At 60% of maximum RPM, a typical fan consumes roughly 40-50% of its nameplate power — so a 100W extractor drops to 40-50W. Over 12 hours daily use, this represents 0.5 to 0.7 kWh savings per day, or roughly 60-80 EUR annually at European electricity rates. For a Variispeed typically costing under 30 EUR, this equals a payback period of just a few months. With more powerful extractors, savings scale further.
Can the controller damage my fan?
No, a thyristor-based controller like the Variispeed does not damage an AC fan in correct operation. Important: do not abruptly turn the knob to minimum while the fan runs at high speed — ramp down gradually to avoid thermal shock to the motor windings. Also avoid running the fan continuously at very low speeds (under 20%); this can cause overheating as internal cooling becomes insufficient. The 30-100% operating range is safe for most fan models.
Can I connect two fans to a single Variispeed?
Technically possible via a power strip, but not recommended. First, the combined power must not exceed the Variispeed maximum load (typically 2A or around 460W). Second, both fans would then be regulated at the same RPM, which is rarely optimal. For setups with multiple fans (extractor + blower), it is better to equip each device with its own controller, or step up to a multi-channel unit like the Cli-Mate Twin Controller for coordinated management.
