FAQs Polyhouse Low Pressure Misting
What is a polyhouse low pressure misting system used for?
It’s used to support cooling and humidity balance inside a polyhouse by adding fine mist in controlled cycles, especially during hot and dry periods.
Is a low pressure misting system for polyhouse the same as a fogging system?
Not exactly. A polyhouse fogging system is typically aimed at a finer, more “fog-like” airborne effect, while low pressure misting can produce slightly larger droplets and needs better cycle control to avoid over-wetting.
How often should I run a low pressure misting system for polyhouse?
Most growers use short ON cycles with OFF gaps so mist evaporates and humidity stabilizes without soaking plants. The exact timing depends on heat, humidity, crop stage, and ventilation.
Will a mist system for polyhouse plants make leaves too wet?
It can if run continuously or if nozzles are placed too close to the crop canopy. Pulsed cycles, correct mounting, and airflow help reduce excess leaf wetness.
Does a polyhouse cooling mist system work in high humidity or monsoon season?
Yes, but it usually needs reduced runtime. When ambient humidity is high, shorter cycles prevent oversaturation and condensation.
What water quality is needed for a low pressure fogging system for polyhouse zones?
Filtered water is important to prevent nozzle clogging and uneven mist. If your water is hard or has sediment, filtration (and sometimes treatment) improves reliability.
Can this be used as a misting system for greenhouse polyhouse structures too?
Yes. A greenhouse low pressure misting system works on the same principle—layout and cycles are adjusted to the structure height, bays, and ventilation pattern.
How do I know if the system is underperforming?
Common signs include uneven mist, visible dripping/streams, frequent nozzle blockage, or unstable pressure. These usually point to filtration issues, clogged nozzles, leaks, or incorrect cycling.
Is this only for humidity, or also for cooling?
Both. Many farms use it as part of a broader polyhouse cooling system, because evaporating mist can reduce heat stress while supporting moisture balance.