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 refrigeration equals 12,000 BTU per hour. The formula converts BTU rating to standard AC tonnage.

3. Importance of AC Tonnage Calculation

Details: Proper sizing ensures energy efficiency, optimal performance, and prevents short-cycling or inadequate cooling.

4. Using the Calculator

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

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/24h = 12,000 BTU/h).

Q2: What's a typical tonnage for residential AC?
A: Most homes need 1-5 tons (12,000-60,000 BTU), depending on square footage and climate.

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

Q4: What if my calculation results in a decimal?
A: AC units typically come in half-ton increments (1.5, 2, 2.5, etc.). Round to nearest standard size.

Q5: Does this account for room size or insulation?
A: No, this only converts BTU to tons. For sizing a new unit, use a Manual J calculation that considers all factors.