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Pure Factory Humidifier - 4L
€57.00
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- Fine, even ultrasonic mist — stable humidity without localized condensation
- 4L tank for 7 to 12 hours of runtime depending on output setting
- Adjustable output via graduated knob — from 70% for cloning to 40% in flowering
- 360° adjustable diffusion to target the canopy without wetting the floor
- Only 30W power draw — runs 24/7 without increasing your electricity bill
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Pure Factory 4L Humidifier: precise humidity control for your growing space
In indoor growing, relative humidity is one of the most underestimated parameters — yet it directly influences nutrient uptake, leaf transpiration, and the overall vigor of your plants. Air that's too dry slows vegetative growth, promotes water stress, and reduces your yields long before you notice the first symptoms.
The Pure Factory 4L Humidifier is designed to address this fundamental need. With its ultrasonic technology and 4-liter tank, it allows you to maintain stable, stage-appropriate humidity levels throughout every phase of development — without constant monitoring. A simple, reliable tool built for the real demands of indoor cultivation.
Why this humidifier makes a difference in your grow room
Fine, even mist thanks to ultrasonic technology
Unlike conventional evaporative humidifiers, ultrasonic technology produces an extremely fine mist that disperses rapidly into the surrounding air. The result: humidity rises gradually and evenly, without creating localized condensation zones that could encourage mold. Combined with a suitable circulation fan, distribution becomes even more uniform throughout your entire space.
360° adjustable nozzle for optimal coverage
The rotating diffusion nozzle lets you direct the vapor flow exactly where it's needed. Whether your setup is compact or expansive, you can aim humidity toward the canopy without wetting the floor or electrical equipment. It's a small detail that makes a big difference in practice.
Precise adjustment for every growth stage
The graduated control knob gives you direct control over vapor output. During germination or cloning, you can easily maintain high humidity levels (70–80%). In flowering, you'll gradually reduce output to stay around 40–50% and minimize fungal risks. This level of control, typically reserved for premium humidifiers, is made accessible to every grower.
Technical specifications explained
4-liter tank: the right balance
With 7 to 12 hours of runtime depending on the selected intensity, the 4-liter tank easily covers a full night or workday without intervention. Fill it in the morning, and your plants stay humidified until evening. For larger growing spaces requiring higher output, Pure Factory also offers an 8-liter model at 300 ml/h for more demanding setups.
30W power consumption: efficient and economical
At just 30 watts, this humidifier runs 24/7 with no noticeable impact on your electricity bill. In indoor growing where every watt counts — between lighting, extraction, and ventilation — this energy efficiency is a genuine daily advantage.
Built-in water level indicator
No more lifting the unit or guessing how much water remains. The visual indicator shows the tank status at a glance. A welcome safeguard to prevent running the unit dry, which could damage the ultrasonic membrane.
Compact size and manageable weight
Weighing just 3 kg empty, the humidifier fits easily inside a grow tent or on a shelf near your plants. Its compact footprint doesn't compromise the tank's usable capacity.
Real-world use: how to integrate it into your grow
The right move from germination
Seedlings and cuttings are especially sensitive to dry air. By placing the humidifier in your propagation area with the output at maximum, you naturally create the ideal conditions for rapid rooting. The first few days of a plant's life are often decisive — properly calibrated humidity makes the difference between a cutting that takes root and one that dries out.
During vegetative growth: supporting leaf development
During the growth phase, plants actively transpire through their stomata. Maintaining relative humidity between 60 and 70% promotes this transpiration and, by extension, nutrient absorption through the roots. The graduated control knob lets you fine-tune this parameter smoothly and precisely.
During flowering: reduce with purpose
Flowering is when humidity control becomes critical. Excess moisture at this stage can encourage botrytis and other pathogens. Gradually reduce the output to bring relative humidity down to 40–50%. The 360° nozzle lets you direct the flow away from the densest areas of the canopy.
Expert tip: use demineralized water
This is arguably the most important advice for this unit. Tap water contains limescale which, when dispersed by ultrasonic waves, settles as a fine white powder on your plants and equipment. Over time, it can also clog the ultrasonic membrane and reduce the unit's effectiveness. Demineralized water (available at any supermarket for just a few dollars per 5 liters) significantly extends the life of your humidifier and keeps your space clean.
Another tip: if you're investing in a complete grow kit, consider positioning the humidifier up high rather than on the floor. The mist naturally descends by gravity and will cover the entire canopy more effectively.
Controlled humidity, visible results
The Pure Factory 4L Humidifier isn't just another gadget in your setup — it's an essential tool for anyone serious about optimizing their growing environment. Silent ultrasonic technology, comfortable runtime, precise adjustment, and negligible power consumption — it ticks all the right boxes without complicating your daily routine as a grower.
Whether you're setting up your first grow space or looking to fine-tune the climate conditions of an existing installation, humidity control remains one of the most effective levers for improving the health and productivity of your plants. A modest investment for a measurable impact, from the very first days of use.
HUMI-PF-4L
Data sheet
- Consumption
- 30W
- Fine, even ultrasonic mist — stable humidity without localized condensation
- 4L tank for 7 to 12 hours of runtime depending on output setting
- Adjustable output via graduated knob — from 70% for cloning to 40% in flowering
- 360° adjustable diffusion to target the canopy without wetting the floor
- Only 30W power draw — runs 24/7 without increasing your electricity bill