1. What is AC Tonnage Calculation?

The AC Tonnage Calculator determines the required air conditioning capacity (in tons) needed to cool a space based on its square footage and BTU (British Thermal Unit) requirements per square foot.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( Sq\ Ft \) — Area to be cooled in square feet
• \( BTU\ per\ sq\ ft \) — Cooling requirements per square foot (typically 20-30 BTU/sq ft for residential spaces)
• \( 12000 \) — Conversion factor (1 ton of cooling = 12,000 BTU/hour)

Explanation: The calculation converts the total BTU cooling requirement into tons of AC capacity needed.

3. Importance of Proper AC Sizing

Details: Proper AC sizing is crucial for energy efficiency and comfort. An undersized unit won't cool properly, while an oversized unit will short-cycle, reducing efficiency and lifespan.

4. Using the Calculator

Tips: Enter the square footage of the space and the BTU requirement per square foot (typically 20 for shaded areas, 30 for sunny areas, or consult an HVAC professional).

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU per square foot for residential cooling?
A: Generally 20-30 BTU/sq ft, with 20 for shaded areas, 25 for average, and 30 for sunny areas or rooms with many windows.

Q2: Why divide by 12,000 in the calculation?
A: One ton of cooling equals 12,000 BTU/hour, so dividing by 12,000 converts BTU requirements to tons.

Q3: What if my space has high ceilings?
A: For ceilings over 8 feet, multiply the square footage by the ceiling height divided by 8 before using the calculator.

Q4: Does this account for insulation quality?
A: No, the BTU per square foot input should be adjusted based on insulation - lower for well-insulated spaces, higher for poorly insulated ones.

Q5: Should I round up the calculated tonnage?
A: AC units come in standard sizes (1.5, 2, 2.5, 3, 3.5, 4, 5 tons). Round to the nearest standard size, but consult an HVAC professional for precise sizing.