Step-by-step procedure to comply with your LEED credit requirement of fresh air in your building
To comply with the LEED credit for fresh air requirement of a building, you will need to follow a testing procedure to determine the amount of fresh air needed for each application area based on the area and number of occupants. The procedure involves calculating the required ventilation rate for each area and comparing it with the actual ventilation rate provided by the HVAC system.
Here are the steps you can follow:
- Determine the area and number of occupants for each application area.
- Calculate the required ventilation rate for each application area using the formula:Required Ventilation Rate = CFM/person x Number of Occupants + CFM/sq.ft x AreaCFM/person = Cubic Feet per Minute of fresh air required per person (6 CFM/person is a common value) CFM/sq.ft = Cubic Feet per Minute of fresh air required per square foot (0.6 CFM/sq.ft is a common value)
- Determine the actual ventilation rate provided by the HVAC system for each application area by measuring the air flow using an air flow meter.
- Compare the required ventilation rate with the actual ventilation rate to determine if the HVAC system is providing enough fresh air. If the actual ventilation rate is less than the required ventilation rate, adjust the HVAC system to increase the fresh air supply.
- Install fresh air dampers with the correct size in case of adjustment.
- Verify and document the fresh air damper settings at the time of adjustment.
- Maintain records of the testing and adjustments made for future reference.
By following these steps, you can ensure that your building meets the fresh air requirements specified in the LEED credit for indoor air quality.