Indoor calculated temperature refers to the average air temperature in the area where people live within 2m from the ground. The main rooms of civil buildings generally use 16 ~ 24 ℃. The indoor calculation temperature of this design is TN = 20 ℃. The daily average temperature which is not guaranteed to be 5 days over the years can be used for outdoor temperature calculation. The villa is located in Shanghai, and the calculated outdoor temperature for heating in Shanghai is - 2 ℃.<br>
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