1. What is an AC Tonnage Calculator?

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

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/hr, so we divide the BTU rating by 12,000 to get tons.

3. Importance of Proper AC Sizing

Details: Correct tonnage calculation ensures energy efficiency, proper cooling, and prevents premature system failure.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why 12,000 BTU equals 1 ton?
A: This comes from the amount of heat needed to melt one ton of ice in 24 hours (288,000 BTU/24hr = 12,000 BTU/hr).

Q2: What's a typical BTU rating for homes?
A: Residential AC units typically range from 18,000 BTU (1.5 tons) to 60,000 BTU (5 tons) depending on home size.

Q3: How do I find my AC's BTU rating?
A: Check the model number or nameplate on your outdoor unit, or consult your owner's manual.

Q4: What if my calculation isn't a whole number?
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.

Q5: Does this account for room size or climate?
A: No, this only converts BTU to tons. For proper sizing, consider square footage, insulation, and local climate.