Dew point of moist air from ambient temperature and relative humidity using Magnus formula - the basis for condensation check.
Formula
$$ T_d = \frac{b \cdot \alpha}{a - \alpha}, \quad \alpha = \ln(\text{RH}/100) + \frac{a T}{b + T} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $RH$ | Relative humidity | % | hygrometer |
| $T$ | Air temperature | °C | thermometer |
Sources
- ASHRAE Fundamentals Ch. 1.