Calculate approximate dew-point temperature from air temperature and relative humidity to understand condensation risk.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Uses the Magnus approximation: γ = ln(RH/100) + aT/(b+T), Td = bγ/(a−γ), suitable for typical indoor conditions.
Example: At 24 °C and 60% RH, dew point is roughly 15.8 °C.
HVAC capacity depends on more than floor area. Volume, solar gain, insulation, glazing, occupants and equipment loads all matter; critical selections require a proper heat-load assessment.
It is the approximate temperature at which condensation begins for the same moisture content.
Condensation becomes possible and long-term moisture/mold risk can increase.
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