Does turning on the air conditioning affect exhaust emission testing?

[DonovanRose]

Turning on the air conditioning does not affect exhaust emission testing. Situation with prolonged stay in the waiting area: Normally, it is not an issue because the power for the air conditioning comes from the generator. However, if the air conditioning is left on continuously while idling in the waiting area, it may cause carbon monoxide levels to exceed the standard. This is because combustion quality deteriorates during idling, especially during prolonged idling. Exhaust emission testing: This involves analyzing and measuring the composition and concentration of exhaust gases emitted by motor vehicles during idling or under operating conditions, either on-site or using a dynamometer. The large amounts of harmful exhaust gases emitted by motor vehicles during operation are a major mobile source of environmental air pollution. Exhaust emission testing is a crucial component of environmental air pollution monitoring. The main testing items include carbon monoxide, nitrogen oxides, hydrocarbons, photochemical oxidants, and smoke density.