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by chebucto 4734 days ago
Ventilation is a major factor, at least on hot days.

How does the outside air temperature affect the temperature of underground parking lots? Are they as hot or less hot during the winter?

CO is deadly; air must be recycled very quickly. All else being equal, it seems like ventilation would bring the facility to outside ambient temperature quickly.

http://www.mobilecalibrationservices.com/Ventilation_for_enc...

"For enclosed parking facilities, ANSI/ ASHRAE Standard 62-1989, Ventilation for Acceptable Indoor Air Quality specifies a fixed ventilation rate of below 7.62 L/s·m2 (1.5 cfm/ft2) of gross floor area.2 Therefore, a ventilation flow of about 11.25 air changes per hour is required for garages with 2.5 m (8 ft) ceiling height. However, some of the model code authorities specify an air change rate of four to six air changes per hour. ..."