Saturation temperature is the temperature at which air becomes 100% saturated with water vapor at a given pressure. At this point, air cannot hold additional moisture, and condensation begins to occur. Knowing saturation temperature helps HVAC technicians prevent condensation in ductwork and identify dew point conditions.
Technical Significance
Saturation temperature varies with atmospheric pressure. At sea level and standard pressure, water saturates at 212°F (100°C). In HVAC systems, saturation temperature determines when condensation forms on coils and surfaces, typically ranging from 40°F to 60°F in cooling applications.
System Applications
Understanding saturation temperature prevents equipment damage, mold growth, and moisture-related failures. Technicians use psychrometric charts to cross-reference saturation temperature with relative humidity and dew point to maintain proper system operation and indoor comfort levels between 68°F to 75°F and 30% to 60% relative humidity.