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Product sheet
Ultra Mist 4500 Ultrasonic Humidifier - 4.5L LCD
€88.40
Tax included
Shipping within 2 to 3 weeks
- Built-in digital hygrostat: automatically regulates humidity to your set point — no manual adjustment needed
- Dual 360° rotating nozzle: fine, even ultrasonic mist across the entire space with no droplets on foliage
- Antibacterial 4.5L tank with top-fill design — lasts a full night without intervention
- LCD display + remote control: monitor and adjust settings from a distance, even in hard-to-reach tents
- Silent ultrasonic operation, no heat, auto-shutoff on empty tank — compact 20 × 20 × 27 cm footprint
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Ultra Mist 4500 Humidifier: precise humidity control for your growing space
Poor humidity management is the kind of silent mistake that costs dearly in indoor growing. Air too dry: stomata close, growth stalls, leaf edges dry out and curl. Air too humid: botrytis sets in, mould spreads, and your harvest pays the price. Between these two extremes lies an optimal window — and that's exactly where the Ultra Mist 4500 ultrasonic humidifier keeps you.
With its built-in digital hygrostat, LCD display and 4.5-litre tank, this unit does far more than produce mist: it actively regulates the humidity in your grow room. You set the target, it does the rest. No more constant manual adjustments or anxious checks on your thermo-hygrometer.
What sets the Ultra Mist 4500 apart from a standard humidifier
True automatic humidity control
Most budget humidifiers run continuously with no intelligence whatsoever. They mist until the tank is empty, whether the air sits at 40% or 85% relative humidity. The Ultra Mist 4500 works differently: its digital hygrostat measures humidity in real time and controls mist output autonomously. When the level reaches your set point, the unit shuts off. When it drops, it kicks back in. This cycling operation is not only more accurate, but also more efficient with water and electricity.
Fine, even mist coverage thanks to the dual 360° nozzle
A poorly aimed humidifier creates saturated zones nearby and pockets of dry air elsewhere. The Ultra Mist 4500's dual 360° rotating nozzle solves this problem: you aim each outlet independently to cover your entire space. The ultrafine ultrasonic mist blends quickly into the surrounding air without falling as droplets onto foliage — an important point for preventing leaf spotting and fungal growth.
4.5 litres of capacity for uninterrupted sessions
Nothing is more frustrating than refilling a tank every two hours. With a 4.5-litre capacity, the Ultra Mist 4500 easily lasts a full night — or longer depending on the output setting and room conditions. Top-fill design means no disassembly, and the translucent tank lets you check the water level without opening your tent. If you need a similar capacity in a different form factor, take a look at the UltraMist 4.5-litre humidifier, a compact variant from the same range.
Ultra Mist 4500 humidifier — full specifications
Ultrasonic technology: silent and heat-free
Ultrasonic technology breaks water into micro-droplets using high-frequency vibrations, with no heating element involved. In practical terms, this means three things for you: near-silent operation that won't disturb your light cycles or your sleep, minimal power consumption, and zero burn risk if the unit is in a shared space. The 100–240V (50/60 Hz) power supply ensures universal compatibility with all European installations.
LCD display, remote control and built-in safety
The backlit LCD screen continuously shows the measured humidity level and the programmed target — so you always know exactly where things stand. The included remote control saves you from contorting yourself to reach the unit sitting on the floor of your grow tent. And if you forget to refill the tank, the auto-shutoff dry-run protection cuts power automatically, shielding the ultrasonic membrane from premature wear.
Compact footprint that sacrifices nothing
Measuring just 20 × 20 × 27 cm, the Ultra Mist 4500 fits on the floor or a shelf without eating into your plants' growing space. Its antibacterial-treated tank naturally limits micro-organism growth between cleanings — a detail that makes a real difference when you're striving to maintain a healthy growing environment.
When and how to use the Ultra Mist 4500 in your grow
Cloning and germination: humidity as a survival factor
Cuttings and young seedlings don't yet have an effective root system. They rely almost entirely on foliar absorption for hydration. A relative humidity of 70–80% isn't a luxury at this stage — it's a survival requirement. Set the hygrostat accordingly, and the Ultra Mist 4500 will hold that level without any intervention on your part. As a complement, a single-head ultrasonic mist maker placed directly inside your propagator will ensure optimal localised saturation.
Vegetative phase: maximising leaf development
It's during vegetative growth that your plants transpire most and gas exchange is at its peak. A level of 60–70% relative humidity keeps stomata open longer, boosting photosynthesis and nutrient uptake. The 4.5-litre tank really comes into its own here: no interruptions during those long light periods.
Flowering and winter months: correcting dry air
During flowering, humidity is typically lowered to 40–50% to minimise the risk of mould on buds. But in winter, domestic heating can push humidity below 30% — well under the acceptable threshold even in late cycle. The Ultra Mist 4500 automatically corrects this deficit. For larger grow spaces where the standard mist output isn't enough, the 5-head ultrasonic mist maker delivers significantly greater diffusion power.
Maintenance tips for long-lasting performance
Use demineralised or reverse-osmosis water whenever possible: limescale from tap water builds up on the ultrasonic membrane and gradually reduces mist output. A weekly tank clean with a water-and-white-vinegar solution prevents biofilm from forming. These simple habits significantly extend the unit's lifespan and ensure consistently fine, even mist.
Ultra Mist 4500: the climate control your setup has been missing
Digital hygrostat for hands-free regulation, dual 360° nozzle for even coverage, antibacterial 4.5-litre tank for extended runtime, LCD display and remote for ease of use, auto-shutoff for safety — the Ultra Mist 4500 humidifier ticks every box for a unit designed with serious indoor growing in mind.
Whether you're running your first cycle or fine-tuning an established production space, humidity control remains one of the most accessible levers for improving plant vigour and health. Also worth considering is the HumiPro 4L Garden HighPro humidifier, a proven alternative for compact grow spaces.
HUMI-ULTRAM-4500
Data sheet
- Product Size
- 20x20x27cm
- Built-in digital hygrostat: automatically regulates humidity to your set point — no manual adjustment needed
- Dual 360° rotating nozzle: fine, even ultrasonic mist across the entire space with no droplets on foliage
- Antibacterial 4.5L tank with top-fill design — lasts a full night without intervention
- LCD display + remote control: monitor and adjust settings from a distance, even in hard-to-reach tents
- Silent ultrasonic operation, no heat, auto-shutoff on empty tank — compact 20 × 20 × 27 cm footprint