1. What is Ducted AC Capacity Calculation?

Ducted air conditioner capacity calculation determines the cooling capacity required for a space based on airflow (CFM) and temperature difference. Proper sizing is crucial for efficient operation and comfort.

2. How Does the Calculator Work?

The calculator uses the standard HVAC capacity formula:

Where:

• \( CFM \) — Airflow in cubic feet per minute
• \( \Delta T \) — Temperature difference in °F
• \( 1.08 \) — Constant factor for air density and specific heat
• \( 12000 \) — Conversion factor from BTU/h to tons

Explanation: This formula calculates the cooling capacity in tons, where 1 ton equals 12,000 BTU/h of cooling capacity.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures optimal energy efficiency, proper dehumidification, extended equipment life, and consistent comfort levels throughout the conditioned space.

4. Using the Calculator

Tips: Enter CFM (airflow rate) and temperature difference between supply and return air. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is CFM in HVAC systems?
A: CFM stands for Cubic Feet per Minute, measuring the volume of air flowing through the duct system per minute.

Q2: How is temperature difference (ΔT) measured?
A: ΔT is the difference between return air temperature and supply air temperature, typically measured in °F.

Q3: What is a typical ΔT for residential AC systems?
A: Most residential systems operate with a ΔT between 15-20°F for optimal performance and dehumidification.

Q4: Why is proper AC sizing important?
A: Oversized units short cycle, reducing efficiency and dehumidification. Undersized units run continuously but cannot maintain temperature.

Q5: Can this calculator be used for commercial systems?
A: Yes, the formula applies to both residential and commercial ducted air conditioning systems.