1. What is an AC Tonnage Calculator?

Definition: This calculator determines the required air conditioning capacity in tons based on the cooling capacity in BTU/hr.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

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

3. Importance of Proper AC Sizing

Details: Correct tonnage calculation ensures energy efficiency, proper cooling, and prevents system overwork or short cycling.

4. Using the Calculator

Tips: Enter the total cooling capacity in BTU/hr. The value must be > 0. For whole-house calculations, first determine the required BTU based on square footage and climate.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my required BTU?
A: Use our BTU Calculator or multiply square footage by 20-25 BTU per sq ft (adjust for climate).

Q2: What's a typical tonnage for a house?
A: Average homes need 1 ton per 400-600 sq ft, but this varies by climate and insulation.

Q3: Why 12,000 BTU equals 1 ton?
A: This comes from the amount of heat needed to melt 1 ton of ice in 24 hours (288,000 BTU/day = 12,000 BTU/hr).

Q4: Should I round up the tonnage?
A: HVAC systems come in standard sizes (1.5, 2, 2.5, etc. tons). Round to nearest standard size, but consult an HVAC professional.

Q5: What if my calculation is between standard sizes?
A: It's generally better to slightly undersize than oversize to maintain efficiency and proper humidity control.