noun
ambient air cooling; cooling with outside air
Technical term used in HVAC and building engineering for cooling indoor spaces by introducing cooler outdoor air instead of using mechanical refrigeration.
このビルは外気冷房を採用して省エネを図っている。
This building uses ambient air cooling to save energy.
外気冷房システムは、外気温が低いときに冷房負荷を減らせる。
An ambient air cooling system can reduce the cooling load when the outside temperature is low.
Compound of 外気 (outside air) and 冷房 (cooling, air conditioning). A modern technical term.