Demonstrate that it is not feasible to meet ASHRAE 62.1-2007 because of building design and construction. Also, demonstrate that at least 10 cfm per person of outdoor air is supplied under normal operating conditions. Projects able to demonstrate both of these items can earn the prerequisite, even though they don’t provide optimal indoor air quality.
Demonstrate that each air handling unit supplies the minimum outdoor air flow specified by ASHRAE 62.1-2007. If one or more air handling units do not meet the ASHRAE requirements, you can still earn the prerequisite by using the EQp1 Option B Calculator to show that those units supply at least 10 cfm per person.
Test all building exhaust systems to confirm that they are functioning as intended. Be sure to confirm proper function, including fan speed, voltage, control sequences, and set points.
Compare measured flow with required levels of outdoor air for each ventilation zone. Calculate the required outdoor air levels by completing ventilation rate procedure (VRP) calculations using the provided ASHRAE 62MZCalcs spreadsheet for each air handling unit.
Conduct airflow monitoring using manual instrumentation or a building automation system to document outdoor airflow rates. Gather data or take measurements for each air handling unit or ventilation zone; sampling is not permitted.
For mechanical and mixed-mode ventilation systems, follow the guidelines specified in ASHRAE 62.1-2007, Section 6 (detailed below) and use the provided 62MZCalcs calculator to determine ASHRAE-compliant ventilation rates for each air-handling unit and zone in the building.
