HVAC ASHRAE Psychometric Chart

HVAC Systems & Components

Psychometrics or psychrometry or hygrometry are terms used to describe the field of engineering concerned with the determination of physical and thermodynamic properties of gas-vapor mixtures.

Psychometric Chart Variables:

• Dry Bulb Temperature
• Wet Bulb Temperature
• Relative Humidity
• Specific Humidity
• Specific Volume
• Specific Enthalpy
• Specific Volume
• Psychometric Ratio
• Humid Heat
• Pressure

ASHRAE Psychometric Chart No.1 Normal Temperature Barometric Pressure: 29.921 Inches.

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Derived from the following: American Society of Heating, Refrigeration