1. What is AC Tonnage Calculation?

AC tonnage calculation determines the appropriate air conditioning capacity needed for a room based on its area and specific cooling requirements. Proper sizing is essential for energy efficiency and optimal cooling performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Area \) — Room area in square feet
• \( Factor \) — BTU per square foot based on room characteristics
• \( 12000 \) — Conversion factor (1 ton of cooling = 12,000 BTU/hour)

Explanation: The formula calculates the required cooling capacity in tons by multiplying the room area by an appropriate factor (typically 20-30 BTU/sq ft depending on insulation, sunlight exposure, etc.) and dividing by 12,000 to convert to tons.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures energy efficiency, proper humidity control, longer equipment life, and optimal comfort. Oversized units cycle too frequently, while undersized units run continuously without adequately cooling.

4. Using the Calculator

Tips: Enter room area in square feet and an appropriate factor (typically 20 for well-insulated rooms, 25 for average, or 30 for rooms with high sun exposure or poor insulation). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good factor value to use?
A: For well-insulated rooms: 20 BTU/sq ft; average rooms: 25 BTU/sq ft; rooms with high sun exposure or poor insulation: 30 BTU/sq ft.

Q2: What if my room has high ceilings?
A: For ceilings higher than 8 feet, multiply the area by (ceiling height/8) before using the calculator.

Q3: Should I round up the calculated tonnage?
A: AC units come in standard sizes (1, 1.5, 2, 2.5, 3, 3.5, 4, 5 tons). Round to the nearest standard size, but avoid significantly oversizing.

Q4: Does this calculation work for entire homes?
A: For whole-house calculations, you should calculate each room separately and sum the results, or use specialized Manual J calculations.

Q5: What other factors affect AC sizing?
A: Window area and orientation, number of occupants, heat-generating appliances, insulation quality, and local climate all affect cooling requirements.