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HVAC Sizing Calculators
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How many BTUs do you need? As a starting point, plan on roughly 20 BTU per square foot of living space for cooling and 30–60 BTU per square foot for heating, depending on your climate. A 500 sq ft room needs about 10,000 BTU of cooling (a 1-ton system) and...

The best mini split system depends on your use case. For most homeowners, Mitsubishi Electric and Daikin lead on reliability and cold-climate performance, MRCOOL is the easiest DIY choice, and Senville or Cooper&Hunter offer the best value. To choose well, match...