1. What is the Air Flow Calculation Formula?

The air flow calculation formula (Q = A × v) calculates the volumetric flow rate of air through a given cross-sectional area. This fundamental equation is widely used in HVAC systems, ventilation design, and fluid dynamics applications.

2. How Does the Calculator Work?

The calculator uses the air flow formula:

Where:

• \( Q \) — Air flow rate (m³/s)
• \( A \) — Cross-sectional area (m²)
• \( v \) — Flow velocity (m/s)

Explanation: The formula calculates the volume of air passing through a given area per unit time, based on the velocity of the airflow.

3. Importance of Air Flow Calculation

Details: Accurate air flow calculation is essential for designing ventilation systems, ensuring proper air quality in buildings, calculating heating and cooling loads, and optimizing energy efficiency in HVAC applications.

4. Using the Calculator

Tips: Enter cross-sectional area in square meters (m²) and flow velocity in meters per second (m/s). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the inputs?
A: Use square meters (m²) for area and meters per second (m/s) for velocity to get flow rate in cubic meters per second (m³/s).

Q2: Can I use different units?
A: Yes, but you'll need to convert to consistent units. For example, use cm² and cm/s, but note the result will be in cm³/s.

Q3: What is a typical air flow rate for ventilation?
A: Typical ventilation rates range from 0.5-2.0 m³/s per person depending on the space type and occupancy.

Q4: How does temperature affect air flow calculations?
A: Temperature affects air density, which can impact mass flow rate. This calculator provides volumetric flow rate at the measurement conditions.

Q5: Where is this formula commonly applied?
A: HVAC system design, duct sizing, fan selection, ventilation requirements, industrial process ventilation, and environmental control systems.