The breathing zone outdoor airflow (Vbz), is determined using Equation 6-1 from ASHRAE Standard 62.1. We'll also discuss how these calculations are implemented in TRACE 3D Plus.ĪSHRAE Standard 62.1 outlines the following procedure to determine the outdoor airflow required for each ventilation zone.ĭetermine minimum outdoor airflow requirement, Vbz, for each breathing zone(s) To demonstrate this procedure, we'll use an example VAV system with three breathing zones.
BREATHING ZONE IPHONE HOW TO
For instructions on how to import libraries, see Importing and Exporting Libraries to and from a TRACE TRL File. Standard libraries for years 20 are attached to this document. Standard libraries for ASHRAE 62.1 year 2007, 2010, and 2013 come with the program. The "Ventilation Rate Procedure" (Section 6.2) in ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, prescribes the quantity of outdoor air that must be delivered to each zone, based on the expected use of that zone, and then prescribes how to calculate the outdoor airflow needed at the system-level intake. This requires the removal of an equal quantity of air from the building. Ventilation refers to the introduction of an adequate amount of fresh air to dilute contaminants that are generated inside the building (by people, equipment, processes or furnishings). Applying ASHRAE Standard 62.1: Ventilation for Acceptable Indoor Air Quality for TRACE 3D Plus