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Hospital Ventilation :: ASHRAE 170 ACH Tables and Calculator Excel Spreadsheet xlxs

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ASHRAE 170 ACH Tables and Calculation
ASHRAE 170 ACH Tables and Calculation

Download free excel sheet for ASHRAE 170- 2017 Standard tables and calculation for outdoor air requirement or ACH (air change per hour) needed for hospitals or health care facilities ventilation.

This excel sheet calculates the required minimum outdoor Air CFM/sqft input for HAP using 170- 2017, Table 7-1 ACH values, these values are required for HAP to analyze healthcare facilities ventilation.

How to calculate outdoor air required in healthcare facilities:

After downloading the below spreadsheet xls follow these steps:

  • Yellow cells are input cells 
  • Blue cells are automatic values obtained from Table 7-1 
  • Green cells are the calculation result values to be input into HAP as OA1

When entering ventilation air in the HAP space input, change units to CFM/sqft and enter values in green cells as OAI only. Leave the 0A2 input field blank (as shown in Fig 2 on right) In HAP system input, under zone components tab under supply terminals, enter minimum supply airflow ACH rate as indicated in Column "I".


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