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Professional Psychrometric Chart
ASHRAE-compliant psychrometric calculations with interactive visualization
State Point Calculator
Pressure: 14.696 psia
Psychrometric Properties
Dry Bulb
75.0 F
Wet Bulb
-- F
Dew Point
-- F
Relative Humidity
-- %
Humidity Ratio
-- lb/lb
Humidity Ratio
-- gr/lb
Enthalpy
-- BTU/lb
Specific Volume
-- ft3/lb
Density
-- lb/ft3
Vapor Pressure
-- psia
ASHRAE Psychrometric Chart
Cursor:
--F DB,
-- lb/lb,
--% RH,
-- BTU/lb
Saturation Curve (100% RH)
Relative Humidity Lines
Wet Bulb Lines
Enthalpy Lines
ASHRAE 55 Comfort Zone
State Points
HVAC Process Lines
Calculate and visualize psychrometric processes
Sensible Heating Process
Constant humidity ratio (horizontal line on chart)
Process Results
Calculate a process to see results
Air Mixing Calculator
Calculate mixed air conditions from two airstreams
Airstream 1 (Return Air)
Airstream 2 (Outside Air)
Mixed Air
Total CFM:
10,000
Dry Bulb:
-- F
Wet Bulb:
-- F
RH:
-- %
Humidity Ratio:
-- lb/lb
Enthalpy:
-- BTU/lb
State Points Table
| Name | DB (F) | WB (F) | DP (F) | RH (%) | W (lb/lb) | W (gr/lb) | h (BTU/lb) | v (ft3/lb) | Actions |
|---|
ASHRAE 55-2020 Thermal Comfort
Calculate a point to check comfort zone compliance
Summer Comfort Zone (0.5 clo)
Operative temp: 74.5-80.5F at low humidity
Upper humidity limit: ~0.012 lb/lb
Winter Comfort Zone (1.0 clo)
Operative temp: 67-77F at low humidity
Upper humidity limit: ~0.012 lb/lb