kJ/(kg·°C)

kilojoule per kilogram-Celsius

Specific heat capacityexact by definition

The kilojoule per kilogram-Celsius is 1000 J/(kg·K) exactly, and the form most European and international HVAC work uses. Water is 4.182 kJ/(kg·°C), air about 1.006, so the two numbers that carry most building heat calculations both fit in one digit and a decimal.

1 kJ/(kg·°C) 1,000 J/(kg·K)