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The conversion between BTU/h (British Thermal Units per hour) and tons is used in air conditioning to express cooling capacity. One ton of cooling capacity equals 12,000 BTU/h, which originated from the amount of heat needed to melt one ton of ice in 24 hours.
The calculator uses the simple formula:
Where:
Explanation: This conversion allows HVAC professionals and consumers to understand air conditioner capacity in both traditional (tons) and scientific (BTU/h) units.
Details: Properly sizing air conditioning units is crucial for energy efficiency and comfort. Undersized units won't cool adequately, while oversized units cycle too frequently, reducing efficiency and humidity control.
Tips: Enter the BTU/h rating of your air conditioning equipment to find its equivalent in tons. This helps when comparing different systems or understanding specifications.
Q1: Why is 12,000 BTU/h equal to 1 ton?
A: Historically, it represented the cooling effect of melting one ton of ice in 24 hours (288,000 BTU/24h = 12,000 BTU/h).
Q2: What size AC unit do I need for my home?
A: While this calculator converts units, proper sizing requires Manual J calculations considering square footage, insulation, climate, and other factors.
Q3: Is higher tonnage always better?
A: No, oversized units cool too quickly without proper dehumidification, leading to "clammy" conditions and short cycling that reduces efficiency.
Q4: How many square feet will 1 ton cool?
A: Roughly 400-600 sq ft in moderate climates, but this varies significantly with insulation, ceiling height, and climate conditions.
Q5: What's the difference between BTU and BTU/h?
A: BTU measures energy, while BTU/h measures power (energy per time). Air conditioner capacities are rated in BTU/h.