1. What is the Wallace CFM Calculator?

The Wallace CFM Calculator estimates cubic feet per minute (CFM) of air flow based on area and velocity measurements. It provides an accurate assessment of air flow rate in ventilation and HVAC systems.

2. How Does the Calculator Work?

The calculator uses the CFM equation:

Where:

• \( Area \) — Cross-sectional area in square feet (sq ft)
• \( Velocity \) — Air velocity in feet per minute (fpm)

Explanation: The equation calculates the volume of air moving through a space by multiplying the cross-sectional area by the air velocity.

3. Importance of CFM Calculation

Details: Accurate CFM calculation is crucial for designing ventilation systems, ensuring proper air exchange rates, and maintaining indoor air quality in residential and commercial buildings.

4. Using the Calculator

Tips: Enter area in square feet and velocity in feet per minute. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is CFM used for?
A: CFM (cubic feet per minute) is used to measure air flow in ventilation systems, HVAC design, and industrial applications to ensure proper air circulation.

Q2: How do I measure area for CFM calculation?
A: Measure the cross-sectional area through which air is flowing. For ducts, this is typically the internal cross-section area.

Q3: What instruments measure air velocity?
A: Anemometers or air flow meters are commonly used to measure air velocity in feet per minute (fpm).

Q4: Are there limitations to this calculation?
A: This calculation assumes uniform air flow across the entire area. In practice, air flow may not be perfectly uniform.

Q5: What is a typical CFM range for residential HVAC?
A: Residential HVAC systems typically range from 400-2000 CFM depending on the size of the home and system capacity.