1. What is the HVAC Louvre Area Calculation?

The HVAC Louvre area calculation determines the free area available for air passage through louvres in HVAC systems. Accurate area calculation is essential for proper airflow and system performance.

2. How Does the Calculator Work?

The calculator uses the simple area equation:

Where:

• \( Length \) — Length of the louvre opening in meters
• \( Width \) — Width of the louvre opening in meters

Explanation: The equation calculates the total open area of the louvre, which is crucial for determining airflow capacity.

3. Importance of Louvre Area Calculation

Details: Proper louvre sizing ensures adequate ventilation, prevents air restriction, and maintains system efficiency while providing protection from weather elements.

4. Using the Calculator

Tips: Enter length and width in meters. Measure the actual opening dimensions, not the frame size. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Should I include the frame in measurements?
A: No, measure only the clear opening dimensions where air can pass through.

Q2: How does louvre design affect the actual free area?
A: Blade angle and spacing reduce effective area. The calculated area should be multiplied by the louvre's free area percentage.

Q3: What's a typical free area percentage for louvres?
A: Typically 35-60% depending on design. Consult manufacturer specifications for exact values.

Q4: Why is louvre area important in HVAC design?
A: Proper sizing prevents excessive pressure drop and ensures adequate airflow for ventilation and equipment cooling.

Q5: How does this relate to air velocity calculations?
A: Air velocity (m/s) = Airflow (m³/s) / Free Area (m²). The calculated area is used to determine face velocity.