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Condensate Rate Calculator 


Review the methodology to ensure it aligns with your project's requirements.

  1. Select US or Metric Units

  2. Select whether to enter the Temperature as the Dry Bulb Temperature (TDB) or the Dew Point Temperature (TDP).

  3. Enter the Initial and final conditions of the TDB or TDP based on your entry for item #2 above. 

  4. If you selected TDB in #2 above, select whether you will next enter the TWB or Relative Humidity [RH%]. If you selected TDP in #2 above, you will enter the RH%.

  5. Enter the initial and final conditions of the TWB or RH%

  6. Enter the air flow rate, CFM [l/s]

  7. Enter the altitude of the project, ft [m]

  8. Click the Calculate button

  9. The results and all the psychrometric parameters are shown in the Results Table.

Methodology and Equations:


This calculator can be used in US or Metric Units.  The user inputs leaving and entering coil conditions as Dry Bulb or Dew Point Temperature, Wet Bulb Temperature or Relative Humidity, coil Airflow rate, and project altitude.  The formulas to calculate the psychometric of the initial and final conditions are based on the methodology outlined in the ASHRAE 2021 Handbook.  The change in the humidity ratio is used to calculate the Condensate Generated.

lb,moisture/hr = Q / v x w x C

    where:       Q = air flow rate, CFM

v= Specific Volume, ft^3/lb,dry air

w= Humidity Ratio lb,moisture/lb,dry air

C= 60 min/ hr

The following conversions are used to calculate the various units of condensate generated :

BTU/h = Pints/day x 1.04 lb/pint  / 24 hrs/day x 1055 BTU/lb

1 kW = 3412.142 BTU/hr

1 kW = 1000 W

1 Gallon = 8 pints = 3.78541 liters

1 Gallon of water = 8.34 lbs

Adicot, Inc.'s Condensate Rate Calculator is a powerful tool designed to comprehensively analyze psychrometric conditions and calculate the condensate generated based on user input. With this calculator, users input initial and final conditions, including dry bulb temperature, wet bulb temperature, relative humidity, and dewpoint temperature. The calculator generates accurate results for various parameters by leveraging the knowledge and guidelines outlined in the ASHRAE Handbook. The Condensate Rate Calculator goes beyond a simple analysis of psychrometric conditions by offering valuable insights into condensate generation. By entering the appropriate data, users can obtain condensate rates in different units, such as pounds per hour (lb/hr), kilograms per hour (kg/hr), gallons per hour (gal/hr), pints per day, and BTUs per hour (BTU/h). This information allows professionals in various fields to make informed decisions about sizing condensate pumps, dehumidifiers, and other relevant equipment. HVAC (heating, ventilation, and air conditioning) engineers, mechanical engineers, energy auditors, and facilities managers frequently encounter situations where accurate calculations of condensate rates are vital for system design, optimization, and equipment selection. The calculator saves valuable time and effort, providing precise results that assist in making informed decisions and ensuring the efficiency and performance of HVAC systems. Professionals involved in industrial processes, such as manufacturing, pharmaceuticals, and food production, can utilize the Condensate Rate Calculator to assess and manage moisture levels in their environments. By understanding the condensate generation rates, they can implement appropriate measures to prevent damage, maintain product quality, and ensure a safe and controlled working environment. Adicot, Inc.'s Condensate Rate Calculator offers a powerful and versatile solution for HVAC, engineering, energy auditing, and industrial process professionals. This calculator empowers users to make informed decisions and optimize their systems for efficient operation by providing a comprehensive psychrometric analysis and accurate condensate rate calculations.

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