Types of fogger nozzles and spray configurations
Foggers are classified by nozzle assembly, orifice diameter, and discharge flow rate.
- Four-Way Foggers: Four cross-mounted micro-nozzles with a weighted stabilization drop tube and anti-drip valve; standard for polyhouse ceilings.
- Single-Way Micro Foggers: Single-orifice nozzles used along sidewall perimeters or narrow propagation benches.
- Anti-Drip Valve: Automatically shuts off water flow when line pressure drops below 1.5 bar, preventing water dripping onto tender crops below.
- Droplet Sizing: Produces ultra-fine droplets (20 to 50 microns) that evaporate in mid-air (flash evaporation) to absorb ambient heat.
Agricultural and livestock applications
Evaporative cooling protects high-value crops and animals from intense summer heat stress.
- Polyhouse Climate Control: Maintains optimal relative humidity (60% to 75%) and lowers greenhouse temperature during peak dry summer months.
- Plant Tissue Culture & Seedling Nurseries: Supplies atmospheric humidity required for tender rootless cuttings without dislodging potting media.
- Dairy Cattle Sheds: Reduces heat stress in crossbred cows, preventing summer milk yield drops and reproductive failure.
- Poultry Houses: Lowers heat-induced mortality in broilers and layers during extreme summer heatwaves.
- Mushroom Cultivation: Maintains constant 85% to 90% relative humidity required for pinhead formation in oyster and button mushrooms.
System pressure, water filtration, and maintenance
Because fogger orifices are microscopic, rigorous water filtration is mandatory.
- Operating Pressure: Requires 3.0 to 4.5 bar (45 to 65 PSI) pump pressure to achieve complete atomization without coarse sputtering.
- Filtration: Install a dual filtration system (disc filter plus 130-micron screen filter) to prevent mineral particles from clogging orifices.
- Acid Cleaning: Flush nozzles periodically with a mild food-grade acid solution (nitric or citric acid) to dissolve calcium and carbonate scale.
- Subsidies: Fogger and greenhouse climate control systems qualify for financial assistance under the Mission for Integrated Development of Horticulture (MIDH).
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Mission for Integrated Development of Horticulture (MIDH) ↗Related on KisanPe
Common questions
What is the purpose of an anti-drip valve in fogger nozzles?
An anti-drip valve shuts off the nozzle instantly when water pressure drops, preventing large water droplets from dripping and damaging delicate seedlings below.
How does a fogger system cool polyhouses without wetting crops?
The droplets are so tiny (20 to 50 microns) that they evaporate in the air before reaching the ground, absorbing heat through evaporative cooling without wetting leaves.
Can hard water be used in agricultural foggers?
Hard water with high dissolved carbonates clogs microscopic fogger orifices rapidly; use treated or filtered water, and descale nozzles periodically with mild acid flushes.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More General Agriculture & Tools guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.