Frequently Asked Questions

• Why use vertical fans instead of horizontal fans?

  Vertical fans move air down through the canopy, mixing the air more evenly from top to bottom. This helps avoid cold or humid pockets that often form when air only moves sideways. The result is a more uniform temperature and humidity — conditions your plants will notice right away.

• What does “vertical airflow” actually do for the crop?

  It breaks up layers of still air, moves humidity away from leaf surfaces, and evens out temperature differences between the top and bottom of the greenhouse. That means fewer condensation problems and steadier transpiration, even on calm days.

• Can I combine ClimaFlow fans with existing horizontal circulation fans?

  Yes, but the ClimaFlow system is designed to replace most or all of your horizontal circulation. In practice, too much horizontal flow can interfere with the downward air pattern, so it’s best to plan your airflow as one integrated system.

• What’s the difference between the two ClimaFlow installation types?

  In a fan-only setup, the vertical fans recirculate air inside the greenhouse. In a VentilationJet system, fresh air is drawn from above the energy screens and pushed down into the crop zone. Both improve air movement, but the VentilationJet adds dehumidification and air exchange.

• When is the fan-only solution enough?

  When your main goal is to keep the air moving and conditions are already well controlled, the fan-only system is often sufficient. It’s a simple, energy-efficient way to prevent humidity build-up and temperature layering.

• When should I choose the VentilationJet system?

  When you need more than circulation — for example, if screens must stay closed for light abatement, or if you want to pull in drier air from above the screens to reduce humidity. The VentilationJet is also ideal when external air is cooler or less humid and can improve your internal climate balance.

• Can the VentilationJet work when energy screens are closed?

  Yes. That’s one of its main advantages. It draws air from above the closed screens, mixes it with the air below, and distributes it downward. This keeps air fresh and humidity under control even when screens stay fully closed at night.

• How are the fans and VentilationJets controlled?

  Both are driven by standard 0–10 V control signals, so fan speeds can be adjusted automatically to match climate needs — gentle mixing when conditions are stable, stronger circulation when humidity rises. This is a critical application for nurseries, for example, where it is desirable to be able to adjust airflow through young plants.

• How much area does one fan cover?

  Roughly 250 m² per fan is a good design reference. The exact number depends on greenhouse height, crop density, and desired mixing intensity.

• Can ClimaFlow be installed in any greenhouse type?

  Yes, almost any. The system can be fitted in both new and existing houses. There’s also a compact VentilationJet Slim model that fits tighter trellis or ceiling spaces.

• How should the fans be positioned?

  They should hang vertically — within about five degrees of straight — to avoid vibration and ensure the airflow pattern stays uniform. Each fan should also have enough free space above and below for the air column to form properly.

• What improvements can growers expect after installing ClimaFlow?

  A more even temperature profile, lower average humidity, less condensation, and fewer local disease pressures. Most growers also report more predictable screen behaviour and energy savings because climate control becomes smoother and more stable.

• Does ClimaFlow replace dehumidifiers or heating for moisture control?

  Not necessarily, but it reduces the need for them. By moving and mixing air efficiently, it prevents moisture build-up before it becomes a problem — saving both energy and equipment runtime.