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Central AC Unit Tonnage Calculator

Tonnage Calculation:

\[ Tons = \frac{BTU/h}{12000} \]

BTU/h

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1. What is AC Tonnage?

AC tonnage refers to the cooling capacity of an air conditioning system. One ton of cooling equals 12,000 BTU (British Thermal Units) per hour. This measurement originated from the amount of heat needed to melt one ton of ice in 24 hours.

2. How Does the Calculator Work?

The calculator uses the simple formula:

\[ Tons = \frac{BTU/h}{12000} \]

Where:

Explanation: This conversion helps determine the appropriate size of an air conditioning unit based on its BTU rating.

3. Importance of Proper AC Sizing

Details: Correct AC sizing is crucial for energy efficiency and comfort. An undersized unit won't cool properly, while an oversized unit will short-cycle, leading to humidity problems and higher energy costs.

4. Using the Calculator

Tips: Enter the BTU/h rating of your AC unit (found on the nameplate or specification sheet) to determine its tonnage. Common residential units range from 1.5 to 5 tons.

5. Frequently Asked Questions (FAQ)

Q1: What's the relationship between tons and BTU?
A: 1 ton of cooling = 12,000 BTU/h. This is a standard conversion in the HVAC industry.

Q2: How many square feet will 1 ton cool?
A: Approximately 400-600 sq ft, but this varies based on climate, insulation, and other factors.

Q3: What are common residential AC sizes?
A: Typical sizes are 1.5, 2, 2.5, 3, 3.5, 4, and 5 tons for central air systems.

Q4: Can I use this for heat pumps?
A: Yes, the same calculation applies to heat pumps in cooling mode.

Q5: Why is proper sizing important?
A: Proper sizing ensures energy efficiency, optimal humidity control, and system longevity.

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