Eli5: How is the square footage that a portable air conditioner is rated for calculated?
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It’s been a while since trade school but from what I remember. Cooling is calculated by tonnage. The guy that started carrier calculate that it takes 12000 btus of cooling to keep one ton of ice from melting per hour.
The rule of thumb is one ton of cooling per 600 squat feet. But there’s heat load calculations that are done with special software now. Basically you determine the heat load of a building based on construction materials to determine how much cooling is required for said space.
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