AC Tonnage Formula:
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Definition: This calculator estimates the required air conditioning capacity in tons based on room area and cooling factor.
Purpose: It helps homeowners and HVAC professionals determine the appropriate AC unit size for efficient cooling.
The calculator uses the formula:
Where:
Explanation: The room area is divided by the cooling factor to determine the required cooling capacity in tons.
Details: Correct AC sizing ensures energy efficiency, proper humidity control, and prevents short-cycling of the unit.
Tips: Enter the room area in square feet and cooling factor (default 400 ft²/ton for residential spaces). All values must be > 0.
Q1: What's a typical cooling factor?
A: For residential spaces, 400 ft²/ton is standard. Commercial spaces may use 300-350 ft²/ton in hot climates.
Q2: When should I adjust the cooling factor?
A: Reduce the factor (to 300-350) for rooms with high ceilings, lots of windows, or in very hot climates.
Q3: What if my room has special conditions?
A: For kitchens, sunrooms, or rooms with high heat-generating equipment, consider adding 0.5-1 ton to the calculated value.
Q4: How do I measure room area?
A: Multiply length by width of the room. For irregular shapes, divide into rectangles and sum the areas.
Q5: Does this include whole-house calculations?
A: No, this is for individual rooms. For whole-house calculations, use total square footage and consider insulation quality.