Air Conditioner BTU Calculator (With AC BTU For Room Size Chart)
https://learnmetrics.com/air-conditioner-btu-calculator-with-ac-btu-for-room-size-chart/
WebAir Conditioner BTU (400 Sq Ft) = 400 Sq Ft × 26.5 BTU Per Sq Ft = 10,600 BTU. We can see that we would need about 10,600 BTU to adequately cool this 400 sq ft room. In practice, we would install an 11,000 BTU or 12,000 BTU portable or window air conditioner. It makes sense to get a slightly bigger AC unit (but not by much; heavy oversizing ...
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