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AC Tonnage Formula:
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AC tonnage calculation helps determine the appropriate air conditioning capacity needed for a given space. The standard rule of thumb is that 1 ton of AC cooling capacity is required for every 600 square feet of living space.
The calculator uses the simple formula:
Where:
Explanation: This formula provides a basic estimate of AC capacity needed based on square footage. Actual requirements may vary based on insulation, ceiling height, climate, and other factors.
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 failing to properly dehumidify.
Tips: Enter the total square footage of the area to be cooled. For accurate results, measure the actual living space and exclude areas like garages, attics, and unconditioned basements.
Q1: Is 600 sq ft per ton always accurate?
A: This is a general rule of thumb. Actual requirements may vary from 400-800 sq ft per ton depending on climate, insulation, window quality, and other factors.
Q2: What factors affect AC tonnage requirements?
A: Insulation quality, ceiling height, window size and orientation, local climate, number of occupants, and heat-generating appliances all affect cooling requirements.
Q3: Should I round up or down when choosing AC size?
A: It's generally better to choose the closest standard size. For borderline cases, consider factors like sun exposure and insulation quality before deciding.
Q4: What if my calculation falls between standard sizes?
A: Consult with an HVAC professional who can perform a Manual J calculation for precise sizing based on your specific conditions.
Q5: Are there different requirements for commercial vs residential?
A: Yes, commercial spaces often have different requirements due to higher occupancy, equipment heat loads, and different usage patterns.