• Humidifier Cornwall 8,5 l 1 - Climat Control
  • Humidifier Cornwall 8,5 l 2 - Climat Control
  • Humidifier Cornwall 8,5 l 3 - Climat Control
  • Humidifier Cornwall 8,5 l 4 - Climat Control
  • Humidifier Cornwall 8,5 l 5 - Climat Control
  • Humidifier Cornwall 8,5 l 6 - Climat Control
  • Humidifier Cornwall 8,5 l 7 - Climat Control
  • Humidifier Cornwall 8,5 l 8 - Climat Control
  • Humidifier Cornwall 8,5 l 9 - Climat Control

Humidifier Cornwall 8,5 l

The Cornwall Electronics 8.5 L humidifier delivers up to 350 ml of ultra-fine cold mist per hour, keeping grow rooms and indoor spaces of 12 to 15 m² at the humidity level you actually want. Its ultrasonic transducer breaks water into droplets of 1 to 5 microns while drawing just 25 W, and the 8.5-litre tank sustains roughly 24 hours of continuous output at full power. Top-fill refilling, an automatic dry-run shut-off and a built-in anti-limescale filter make it genuinely low-maintenance, and a dedicated tray even lets you diffuse essential oils. Order it today at plantandflower.be for fast delivery across Europe.

garantie-icon  2 Year Warranty 30 days retour info_logo

Cornwall 8.5 L Humidifier — Ultrasonic Cold Mist for 12–15 m² Grow Spaces

The Cornwall Electronics 8.5 L humidifier (model HUMI8) is an ultrasonic cold-mist unit built for grow rooms, grow tents and indoor plant spaces of 12 to 15 m². It converts water into 1–5 micron droplets at a rate of up to 350 ml per hour, drawing a mere 25 W in the process.

Within our climate range it pairs naturally with the Cli-Mate Humi Controller, which cycles the unit around your target reading for longer unattended runs.

The performance figures that matter

Three numbers define this unit. First, output: up to 350 ml/h (±10%) of mist — enough to lift and hold relative humidity across a 12 to 15 m² footprint. Second, runtime: with an 8.5-litre reservoir feeding that maximum output, you get roughly 24 hours of continuous operation per fill, and proportionally more at reduced intensity. Third, power draw: 25 W, so even continuous humidification barely registers on your energy bill. And because the transducer produces cold mist without any heating element, the unit adds zero heat load to your space — your lights and extraction keep setting the temperature while the Cornwall handles moisture as a fully independent variable. Fewer refills, lower running costs and no thermal interference: that is the whole pitch, and every figure behind it is a verified manufacturer specification rather than marketing shorthand.

Built for hands-off operation

Everything about the housing design points at long, unattended duty cycles:

  • Top-fill design: lift the lid and pour water straight in — no unclipping the tank or flipping it over a sink.
  • Automatic shut-off: a water-level sensor stops the unit the moment the reservoir runs dry, day or night.
  • Anti-limescale filter: a built-in water filter traps scale; demineralised water is still recommended for maximum service life.
  • Essential-oil tray: a few drops in the dedicated tray scent the mist without ever touching the water reservoir.
  • Carry handle: at roughly 1.6 kg the tank travels to the tap and back one-handed.

Dialling in your setup

Pair the humidifier with a deluxe thermo-hygrometer mounted at canopy height, so you can see exactly when relative humidity hits target and when to throttle the mist back. Add a circulation fan such as the Honeywell HT-900 to spread the plume evenly through the room, preventing a saturated pocket around the unit and dry corners further out. Keep the nozzle aimed at open air — away from fixtures, sockets and direct foliage contact — and place the unit on a flat, stable surface before switching it on for the first time.

Technical specifications

Type Ultrasonic cold-mist humidifier
Mist output 350 ml/h (±10%)
Droplet size 1–5 microns
Tank capacity 8.5 L (carry handle)
Coverage 12–15 m²
Power draw 25 W
Supply 220–240 V ~ 50/60 Hz
Dimensions 210 × 210 × 356 mm

The Cornwall Electronics 8.5 L humidifier ships fast from our Belgian warehouse to growers across Europe. Order it today at plantandflower.be, set your target humidity once, and give your climate control the one variable it has been guessing at until now.

How do I size a humidifier for my grow room?

Match rated coverage to floor area first: the Cornwall Electronics 8.5 L humidifier is specified for 12 to 15 m², so smaller rooms simply run it at reduced intensity, while anything larger — or any room with aggressive extraction pulling moisture out — calls for higher output or a second unit. Then check runtime: 8.5 litres at 350 ml/h gives about a day per fill, which suits unattended schedules well.

Does an ultrasonic humidifier raise the temperature in a grow tent?

No. The mist is produced by high-frequency vibration rather than by boiling water, so there is no heating element and no thermal input to the space. At 25 W the unit itself generates negligible warmth, which keeps temperature and humidity as two separate, independently controllable parameters — exactly what you want in a sealed environment.

Should I use tap water or demineralised water?

Demineralised water is the better choice. The built-in filter traps part of the limescale in tap water, but hard water still shortens transducer life over time and can leave fine white dust on nearby surfaces. With demineralised or low-mineral water the mist stays clean and the unit keeps its rated output for longer.

Do you ship this humidifier across Europe?

Yes — orders leave our Belgian warehouse quickly, with fast shipping to growers across Europe. Place your order at plantandflower.be and track it to your door; if you are unsure about sizing for your space, our support team is happy to advise before you buy.