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AC Tonnage Formula:
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The AC Tonnage Formula calculates the required cooling capacity in tons of refrigeration from the BTU (British Thermal Unit) load. One ton of refrigeration equals 12,000 BTU per hour.
The calculator uses the AC Tonnage formula:
Where:
Explanation: This formula converts BTU load to tons of refrigeration, which is the standard unit for measuring air conditioning capacity.
Details: Proper AC tonnage calculation is essential for selecting the right size air conditioning unit for a space. Undersized units will struggle to cool effectively, while oversized units will cycle too frequently, reducing efficiency and comfort.
Tips: Enter the total BTU load in BTU/h. The value must be greater than 0. The calculator will automatically compute the corresponding tonnage.
Q1: Why is 12,000 BTU equal to one ton?
A: One ton of refrigeration is defined as the amount of heat required to melt one ton of ice in 24 hours, which equals 12,000 BTU per hour.
Q2: How do I calculate the BTU load for my space?
A: BTU load is calculated based on room size, insulation, number of occupants, windows, and other heat-generating appliances. Professional HVAC calculations are recommended for accurate sizing.
Q3: What is the typical tonnage for residential AC units?
A: Residential AC units typically range from 1.5 to 5 tons, with 1 ton generally cooling about 400-600 square feet depending on climate and insulation.
Q4: Can I use this calculator for commercial AC systems?
A: Yes, the formula works for both residential and commercial systems, though commercial calculations often require more complex load calculations.
Q5: What happens if I choose the wrong tonnage?
A: Incorrect tonnage can lead to poor cooling performance, higher energy bills, reduced equipment lifespan, and uncomfortable humidity levels.