1. What is an AC Tonnage Calculator?

Definition: This calculator determines the cooling capacity of an air conditioner in tons based on its BTU rating.

Purpose: It helps HVAC professionals and homeowners properly size air conditioning units for spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — AC tonnage (tons of cooling)
• \( BTU \) — British Thermal Units per hour (cooling capacity)

Explanation: One ton of cooling equals 12,000 BTU/hour. Dividing the BTU rating by 12,000 converts to tons.

3. Importance of Proper AC Sizing

Details: Correct tonnage calculation ensures energy efficiency, proper humidity control, and system longevity.

4. Using the Calculator

Tips: Enter the air conditioner's BTU rating (found on unit specifications). Common residential units range from 18,000-60,000 BTU/hr (1.5-5 tons).

5. Frequently Asked Questions (FAQ)

Q1: Why 12,000 BTU per ton?
A: This originates from the amount of heat needed to melt one ton of ice in 24 hours (288,000 BTU/24hr = 12,000 BTU/hr).

Q2: How do I find my AC's BTU rating?
A: Check the model number plate on the outdoor unit or consult manufacturer specifications.

Q3: What's a typical tonnage for a house?
A: Most homes need 1 ton per 400-600 sq ft, but this varies by climate, insulation, and other factors.

Q4: Can I use this for heat pumps?
A: Yes, the calculation works the same for heat pumps in cooling mode.

Q5: Should I round up the calculated tonnage?
A: HVAC systems typically come in standard sizes (1, 1.5, 2, 2.5, 3, 3.5, 4, 5 tons). Round to nearest standard size.