1. What is an AC Tonnage Calculator?

Definition: This calculator converts air conditioner cooling capacity (BTU/hr) to refrigeration tons.

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

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 refrigeration equals 12,000 BTU per hour. The formula converts BTU/hr to tons by dividing by this constant.

3. Importance of Proper AC Sizing

Details: Correct tonnage calculation ensures energy efficiency, proper cooling, and system longevity. Oversized units short-cycle, while undersized units run continuously.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/hr (found on the AC unit's specification sheet). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the relationship between BTU and tons?
A: 1 ton of refrigeration = 12,000 BTU/hr. This originates from the heat needed to melt 1 ton of ice in 24 hours.

Q2: How many BTU/hr is a 3-ton AC unit?
A: 36,000 BTU/hr (3 × 12,000).

Q3: What size AC do I need for my home?
A: As a rough estimate, 1 ton per 400-600 sq ft, but consult an HVAC professional for precise calculations.

Q4: Why is proper AC sizing important?
A: Proper sizing affects efficiency (SEER rating), comfort, humidity control, and equipment lifespan.

Q5: Does this calculator account for climate or insulation?
A: No, this is a basic conversion. For system sizing, use Manual J calculations that consider these factors.