1. What is the AC Size Calculation?

The AC size calculation estimates the cooling capacity needed for a space based on its square footage. The general rule is that 1 ton of cooling capacity is needed for every 600 square feet of space.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Tons \) — Cooling capacity in tons
• \( Area \) — Area in square feet

Explanation: This is a simplified calculation based on standard residential cooling needs. Actual requirements may vary based on climate, insulation, and other factors.

3. Importance of Proper AC Sizing

Details: Proper AC sizing is crucial for energy efficiency and comfort. An undersized unit will struggle to cool the space, while an oversized unit will short-cycle, reducing efficiency and lifespan.

4. Using the Calculator

Tips: Enter the total area to be cooled in square feet. For irregular spaces, calculate the total square footage by adding up all areas.

5. Frequently Asked Questions (FAQ)

Q1: Is 600 sq ft per ton always accurate?
A: This is a general guideline. Hot climates may need 500 sq ft per ton, while cooler climates might use 700 sq ft per ton.

Q2: What other factors affect AC sizing?
A: Ceiling height, insulation, window size/direction, local climate, and heat-generating appliances all affect sizing.

Q3: What if my space is very sunny or shaded?
A: Sunny spaces may need 10-20% more capacity, while shaded areas might need 10% less.

Q4: How do I convert tons to BTUs?
A: 1 ton = 12,000 BTUs. Multiply tons by 12,000 to get BTU rating.

Q5: Should I round up or down?
A: Round to the nearest half-ton for residential units. Commercial systems offer more precise sizing.