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AC Tonnage Formula:
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AC tonnage calculation determines the appropriate air conditioning capacity needed for a space based on its square footage. One ton of cooling equals 12,000 BTU per hour, which can cool approximately 400-600 square feet of space.
The calculator uses the standard formula:
Where:
Explanation: This formula provides a general estimate of the AC capacity needed based on the size of the space.
Details: Proper AC sizing is crucial for energy efficiency, comfort, and system longevity. An undersized unit will struggle to cool the space, while an oversized unit will short cycle, reducing efficiency and humidity control.
Tips: Enter the total square footage of the area to be cooled. For multi-room calculations, use the combined square footage of all spaces.
Q1: What factors besides square footage affect AC tonnage?
A: Ceiling height, insulation quality, window size/direction, climate zone, number of occupants, and heat-generating appliances all affect cooling requirements.
Q2: How accurate is this calculation?
A: This provides a general estimate. For precise sizing, consult an HVAC professional who can perform a Manual J calculation.
Q3: What's the difference between BTU and tons?
A: 1 ton of cooling = 12,000 BTU/hour. Tonnage is a common measurement for residential AC units.
Q4: Should I round up the calculated tonnage?
A: AC units come in standard sizes (1.5, 2, 2.5, 3, 3.5, 4, 5 tons). It's generally better to choose the next available size if your calculation falls between standard sizes.
Q5: Does this work for commercial spaces?
A: The basic principle applies, but commercial calculations are more complex due to higher occupancy, equipment heat loads, and different building materials.