1. What is the Louvre Size Equation?

The Louvre Size Equation calculates the required size of a louvre based on the flow rate and velocity. It's essential for proper ventilation system design and ensuring adequate air flow through the louvre.

2. How Does the Calculator Work?

The calculator uses the simple equation:

Where:

• \( Flow\ Rate \) — Air flow rate in cubic meters per second (m³/s)
• \( Velocity \) — Air velocity through the louvre in meters per second (m/s)
• \( Size \) — Resulting louvre area in square meters (m²)

Explanation: The equation calculates the required cross-sectional area of the louvre to allow the specified flow rate at the given velocity.

3. Importance of Louvre Size Calculation

Details: Proper louvre sizing is crucial for maintaining desired air flow rates, preventing excessive pressure drops, and ensuring system efficiency in HVAC and ventilation applications.

4. Using the Calculator

Tips: Enter flow rate in m³/s and velocity in m/s. Both values must be positive numbers. The calculator will compute the required louvre size in square meters.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical velocity for louvres?
A: Typical velocities range from 2-5 m/s, depending on application and noise considerations.

Q2: How does louvre free area affect the calculation?
A: This calculation gives gross area. Actual louvre size should account for free area percentage (typically 50-70% for standard louvres).

Q3: What factors affect louvre performance?
A: Blade design, free area ratio, weather protection, and installation conditions all impact performance.

Q4: When should I use this calculation?
A: Use during HVAC system design to properly size intake and exhaust louvres.

Q5: Are there limitations to this equation?
A: This is a basic calculation. For precise results, consider pressure drop, free area, and manufacturer-specific performance data.