ACH has two main screens the first screen is the Room ACH rate calculator (Air Changes per Hour), where users can quickly and easily calculate the ACH for a room or space, Users have the flexibility to input room dimensions, room area mode, or room volume mode.Smart input fields gives users the flexibility to calculate the any required parameter knowing the balance parameters.The Second screen Allows the user to obtain the min.Fresh Air or Exhaust air flow rate as per ANSI/ASHRAE Standard 62.1-2016, Table 6.2.2.1 (for min. Fresh Air ventilation rates required in the breathing zone) and Table 6.5 (for min.Exhaust rate), This functionality proves beneficial for HVAC designers, consultants, contractors, and others in the field.