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Conversion Formula:
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The conversion between tons and BTU/hr is essential in HVAC (Heating, Ventilation, and Air Conditioning) systems. One ton of cooling capacity equals 12,000 BTU per hour, which represents the amount of heat required to melt one ton of ice in 24 hours.
The calculator uses the standard conversion formula:
Where:
Explanation: This conversion is based on the historical definition where one ton of refrigeration equals the cooling effect of melting one ton of ice in 24 hours, which equals 12,000 BTU per hour.
Details: Accurate conversion between tons and BTU/hr is crucial for proper HVAC system sizing, energy efficiency calculations, equipment selection, and compliance with building codes and standards.
Tips: Enter the air conditioning capacity in tons. The value must be greater than zero. The calculator will automatically convert to BTU/hr using the standard conversion factor of 12,000 BTU/hr per ton.
Q1: Why is 1 ton equal to 12,000 BTU/hr?
A: This comes from the historical definition where one ton of refrigeration was defined as the heat absorption required to melt one ton of ice in 24 hours, which equals 12,000 BTU per hour.
Q2: What are common residential AC tonnage sizes?
A: Common residential sizes range from 1.5 tons (18,000 BTU/hr) to 5 tons (60,000 BTU/hr), with 2-3 tons being typical for average homes.
Q3: How do I determine what tonnage I need for my space?
A: Professional HVAC contractors use Manual J calculations that consider square footage, insulation, windows, climate, and other factors to determine proper sizing.
Q4: Is higher tonnage always better?
A: No, oversized units can cause short cycling, reduced efficiency, poor humidity control, and uneven temperature distribution.
Q5: What's the difference between BTU and BTU/hr?
A: BTU (British Thermal Unit) is a unit of energy, while BTU/hr is a rate of energy transfer per hour, which is the correct unit for measuring cooling capacity.