1. What is an AC Tonnage Calculator?

Definition: This calculator converts air conditioning cooling capacity from BTU/hr to tons of refrigeration.

Purpose: It helps HVAC professionals and homeowners determine the appropriate AC unit size for a space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Tonnage of AC (tons)
• \( BTU \) — Cooling capacity (BTU per hour)

Explanation: One ton of cooling equals 12,000 BTU per hour. The formula converts BTU to standard AC tonnage units.

3. Importance of AC Tonnage Calculation

Details: Proper AC sizing ensures energy efficiency, adequate cooling, and prevents system overwork or short cycling.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/hr. The value must be > 0. The calculator will output the equivalent tonnage.

5. Frequently Asked Questions (FAQ)

Q1: Why 12,000 BTU per ton?
A: This comes from the historical definition where one ton of cooling equals the heat absorption of one ton of ice melting in 24 hours.

Q2: What's a typical BTU requirement for a room?
A: A general rule is 20 BTU per sq ft, but this varies based on climate, insulation, and other factors.

Q3: How many tons is a 24,000 BTU AC unit?
A: 2 tons (24,000 ÷ 12,000 = 2).

Q4: Should I round up the calculated tonnage?
A: AC units come in standard sizes (1.5, 2, 2.5, 3 tons etc.). Professional load calculation is recommended for exact sizing.

Q5: What happens if my AC is oversized?
A: Oversized units cool quickly but don't run long enough to properly dehumidify, leading to comfort and efficiency issues.