How do you calculate the dew point temperature?

To calculate the dew point temperature, it is essential to understand the relationship between air temperature, relative humidity (RH), and dew point. The formula presented in the correct answer encapsulates this relationship effectively.

When you are given the temperature (T) in degrees Celsius and the relative humidity (RH) as a percentage, the formula Dew Point = T - ((100 - RH) / 5) provides a systematic approach. This formula accounts for the fact that as relative humidity increases, the dew point temperature rises, indicating that the air is holding more moisture. The subtraction of ((100 - RH) / 5) adjusts the temperature downwards to find the point at which the air becomes saturated with moisture, or the dew point.

For instance, if the air temperature is 25°C and the relative humidity is 60%, you would calculate the dew point as follows: Dew Point = 25 - ((100 - 60) / 5), which simplifies to Dew Point = 25 - 8 = 17°C. This indicates that at a temperature of 25°C and 60% humidity, the dew point would be at 17°C, a critical point for determining condensation and comfort levels in HVAC applications.

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