1. What is a Mini Split Tonnage Calculator?

Definition: This calculator converts the cooling capacity of mini split AC systems from BTU/hr to tons of refrigeration.

Purpose: It helps HVAC professionals and homeowners determine the appropriate size of mini split systems for their spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Tonnage (tons of refrigeration)
• \( BTU \) — Cooling capacity (BTU per hour)

Explanation: One ton of refrigeration equals 12,000 BTU/hr. The formula converts BTU rating to standard tonnage measurement.

3. Importance of Proper Tonnage Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU rating for mini splits?
A: Residential mini splits range from 9,000 BTU (3/4 ton) to 36,000 BTU (3 tons) for single-zone systems.

Q2: How many square feet does 1 ton cool?
A: Approximately 400-600 sq ft in moderate climates, but this varies based on insulation and climate.

Q3: What if my calculation isn't a standard tonnage?
A: Mini splits come in fractional ton sizes (0.75, 1, 1.5, 2 tons, etc.). Round to the nearest available size.

Q4: Why 12,000 BTU per ton?
A: This standard dates back to when one ton equaled the cooling effect of melting one ton of ice in 24 hours.

Q5: Should I oversize my mini split?
A: No, oversizing leads to short cycling and poor humidity control. Proper sizing is crucial.