1. What is AC Tonnage?

AC tonnage refers to the cooling capacity of an air conditioning system, measured in tons. One ton of cooling equals 12,000 BTU per hour. Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the standard tonnage formula:

Where:

• 20 — Represents the standard BTU per square foot requirement
• 12000 — Converts BTU to tons (1 ton = 12,000 BTU/hour)

Explanation: This formula provides a basic estimate of required cooling capacity based on square footage.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures energy efficiency, proper humidity control, and system longevity. Oversized units short-cycle, while undersized units run constantly.

4. Using the Calculator

Tips: Enter the area to be cooled in square feet. For precise calculations, consult an HVAC professional who can perform a Manual J calculation.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation accurate for all climates?
A: This provides a general estimate. Hotter climates may require 25-30 BTU/sq ft, while milder climates may need only 15 BTU/sq ft.

Q2: What other factors affect AC sizing?
A: Ceiling height, insulation, window area, sun exposure, and local climate all impact the actual tonnage needed.

Q3: What's the typical tonnage for a home?
A: Average homes typically need 1-5 tons, with 1 ton covering about 600 sq ft in moderate climates.

Q4: Can I install a slightly larger unit?
A: Oversizing by more than 15% is not recommended as it leads to humidity problems and inefficient operation.

Q5: How often should I replace my AC unit?
A: Most systems last 10-15 years. Consider replacement if repairs exceed $500 or the system is over 10 years old.