In this research, we conducted experiments to confirm the effects of particulate matterand CO2 reduction through mist injection by existing technologies of research on low-cost mist spray type high efficiency outdoor machines, with a reduction in air conditioner heat island, improved outdoor unit efficiency by 30% It was. We installed a sensor in the outdoor unit supply / exhaust section and confirmed particulate matter / CO2 amount in accordance with the summer air conditioner operation schedule. When applying the mist spraying device of the air conditioner outdoor unit, it is measured to be lower than the particulate matter / CO2 amount general outdoor unit, so we would like to confirm the effect of reducing the particulate matterdust and CO2 amount through the mist ejection outdoor unit on a building unit basis.