ACH Calculator
ACH (Air Changes per Hour) Calculator
ACH: 0 Air Changes per Hour
ACH Calculator
The ACH Calculator helps HVAC contractors calculate how many times the air in a room is replaced every hour, which is critical for ensuring proper ventilation and indoor air quality.
How It Works:
- Input Data:
- Air Flow Rate (CFM): The volume of air that flows into the room in cubic feet per minute (CFM).
- Room Dimensions:
- Length: The length of the room in feet.
- Width: The width of the room in feet.
- Height: The height of the room in feet.
- Calculation:
- The calculator multiplies the length, width, and height of the room to get the room’s volume in cubic feet.
- It then multiplies the air flow rate (CFM) by 60 to get the total air moved in an hour.
- Finally, the total air moved in an hour is divided by the room’s volume to calculate the Air Changes per Hour (ACH).
Formula:
ACH = (CFM × 60) / Room Volume
Where:
- CFM is the air flow rate in cubic feet per minute.
- Room Volume is calculated as Length × Width × Height in cubic feet.
Output:
The calculator outputs the ACH value, which tells contractors how many times the air in the room is exchanged each hour.
Disclaimer:
The calculations provided by these HVAC calculators are intended to serve as estimates and recommendations made in good faith based on standard industry practices. While efforts have been made to ensure accuracy, these results may not account for all variables, and inaccuracies may occur.
For precise calculations and optimal system design, it is strongly recommended to consult a qualified HVAC design engineer who can take into account the specific requirements and conditions of your project.
Use these tools at your own discretion and always double-check the results with a professional before making significant decisions regarding HVAC installations or modifications.