AC Tonnage Formula:
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Definition: This calculator estimates the required air conditioning capacity in tons based on room area and cooling load.
Purpose: It helps HVAC professionals and homeowners determine the appropriate AC unit size for efficient cooling.
The calculator uses the formula:
Where:
Explanation: The area is multiplied by cooling load to get total BTU/hr, then divided by 12,000 (1 ton of cooling = 12,000 BTU/hr).
Details: Correct tonnage calculation ensures energy efficiency, proper humidity control, and prevents system short-cycling.
Tips: Enter the area in square meters and cooling load (default 80 BTU/hr/m²). Typical cooling loads range between 60-100 BTU/hr/m².
Q1: What cooling load should I use?
A: Use 60-80 for shaded areas, 80-100 for sunny areas, or consult an HVAC professional for precise calculations.
Q2: Why 12,000 in the formula?
A: One ton of cooling equals 12,000 BTU per hour - the standard measurement for AC capacity.
Q3: Should I round up the calculated tonnage?
A: Generally yes, to the nearest 0.5 ton, but consult with an HVAC professional for your specific needs.
Q4: Does this account for room height?
A: This simplified version assumes standard ceiling heights (2.4-3m). For higher ceilings, increase the cooling load.
Q5: What about insulation and windows?
A: Poor insulation or large windows may require increasing the cooling load value within the 60-100 range.