How To Calculate The Number Of Misting Nozzles For Your Space
Getting the right number of misting nozzles is key for creating an effective outdoor cooling system. Too few nozzles will leave hot spots, while too many can create unnecessary humidity and waste water. Here's your step-by-step guide to calculating the perfect number for your space.
Step 1: Measure Your Space Correctly
Start by measuring the area you want to cool. Don't just multiply length by width – account for irregularly shaped spaces by breaking them into rectangles and triangles. Remember to subtract areas you don't want to cool, such as grills or dining tables.
Step 2: Understand Nozzle Coverage
A single high-pressure misting nozzle typically covers a circular area with a 200 cm diameter, depending on mounting height and pressure. However, you'll want nozzles to overlap slightly to ensure consistent cooling. As a rule of thumb, AirMist recommends that nozzles be spaced at 75cm.
Step 3: Factor In Environmental Conditions
Local climate affects nozzle requirements:
- Hot, dry climates: Use 60 cm spacing
- Humid areas: Use 75 cm spacing
- Windy locations: Use 60 cm spacing
- Partially covered areas: Use 75 cm spacing.
This is not crucial, because AirMist pumps have a timing feature that allows varying on/ off times. Even so, we don’t recommend going beyond the 75 cm spacing.
Step 4: Make The Calculation
Use this approach:
- Calculate your line length (perimeter or length of cooling zones)
- Convert to centimetres
- Divide by your chosen spacing
- Round up to the nearest whole number.
For example:
- 8.5 metre perimeter
- This is 850 cm.
- 850 divided by 75 equals 11.33
- 11.33 rounded up is 12 nozzles.
For this example, we would recommend the K050 misting system kit.