Update the footnote references in the section so the text becomes the following:Monitor CO2 concentrations within all densely occupied spaces (those witha design occupant density of 25 people or more per 1,000 square feet).CO2 monitors must be between 3 and 6 feet above the floor.?Provide a direct outdoor airflow measurement device capable of measuringthe minimum outdoor air intake flow with an accuracy of plus or minus 15%of the design minimum outdoor air rate, as defined by ASHRAE 62.1-2007(with errata but without addenda?) for mechanical ventilation systemswhere 20% or more of the design supply airflow serves nondenselyoccupied spaces.