AC Sizing Calculator
- BTU/hr
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- Tons
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- Recommended size
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Standard residential AC sizes: 1.5T, 2T, 2.5T, 3T, 3.5T, 4T, 5T. Avoid oversizing — short cycles hurt efficiency & humidity control.
About this tool
AC Sizing Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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