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Tonnage Formula:
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Air conditioner tonnage refers to the cooling capacity of an AC unit, where one ton equals 12,000 BTU/h (British Thermal Units per hour). This measurement originated from the amount of heat required to melt one ton of ice in 24 hours.
The calculator uses the tonnage formula:
Where:
Explanation: This formula converts the cooling capacity from BTU/h to tons, which is the standard unit for sizing air conditioning systems.
Details: Proper tonnage calculation is crucial for selecting the right-sized air conditioner. An undersized unit will struggle to cool the space, while an oversized unit will cycle on and off frequently, leading to inefficiency and poor humidity control.
Tips: Enter the total BTU/h value. This can be obtained from the AC unit specifications or by calculating the cooling load requirements for your space. The value must be greater than zero.
Q1: Why is proper tonnage important for AC units?
A: Proper tonnage ensures efficient cooling, energy savings, proper humidity control, and extends the lifespan of the equipment.
Q2: What are common tonnage sizes for residential AC units?
A: Common sizes range from 1.5 tons (18,000 BTU/h) for small apartments to 5 tons (60,000 BTU/h) for large homes.
Q3: How do I determine the BTU/h needed for my space?
A: BTU/h requirements depend on room size, insulation, windows, climate, and heat-generating appliances. Professional load calculations are recommended.
Q4: What happens if I choose the wrong tonnage?
A: Undersized units run continuously and can't maintain temperature. Oversized units short-cycle, wasting energy and not dehumidifying properly.
Q5: Can I use this calculator for commercial AC systems?
A: Yes, the formula works for any AC system, though commercial systems often require more detailed load calculations.