Commercial AC Tonnage Formula:
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Commercial AC tonnage refers to the cooling capacity of an air conditioning system, where 1 ton equals 12,000 BTU per hour. This calculator helps estimate the appropriate size for residential applications using commercial-style calculations.
The calculator uses the formula:
Where:
Explanation: The formula calculates the required tonnage by multiplying the area by 30 BTU/sq ft (standard commercial calculation) and converting to tons.
Details: Proper AC sizing is crucial for energy efficiency, comfort, and system longevity. Oversized units short cycle, while undersized units run constantly without proper cooling.
Tips: Enter the total area to be cooled in square feet. For multiple zones, calculate each separately. This provides a rough estimate - consult an HVAC professional for precise sizing.
Q1: Is this calculation different from residential AC sizing?
A: Yes, residential typically uses 20 BTU/sq ft while commercial uses 30 BTU/sq ft. This calculator applies commercial standards to homes.
Q2: What factors aren't accounted for in this calculation?
A: Ceiling height, insulation quality, window area, climate zone, and heat-producing appliances aren't considered in this basic calculation.
Q3: What's the typical tonnage for a 2000 sq ft home?
A: About 5 tons (2000×30/12000), though actual needs may vary based on other factors.
Q4: Can I use this for mini-split systems?
A: The calculation works similarly, but mini-splits are often sized in BTU directly rather than tons.
Q5: Why is proper AC sizing important?
A: Proper sizing ensures energy efficiency, adequate dehumidification, and prevents premature system failure from short cycling or overwork.