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Shopping malls and offices are crowded without strong air circulation, where high level of CO₂ and PM2.5. pollution make people suffer from drowsiness, headaches and inability to keep concentration.

A healthy indoor air quality is shown to increase office productivity by 10%¹, according to the study from the Technical University of Denmark by indoor climate scientists Pawel Wargocki and David P. Wyon. People prefer to shop in malls with good ventilation and comfortable temperature. Air quality is invisible but influences consumer traffic.

Traditional ventilation system can solve the problem of high CO₂ , but lacks purification and sterilization function. During the flu season, cross-infection can be easily found in office with air-condition on, but window closed. When the situation of COVID-19 gets better and workers go back to office, central air-conditioning system (with air flow returned) was not recommended to turn on, despite the weather is still quite cold in February.

Many companies delayed the time work resumption because of the risky indoor environment. Fresh air system with purification function has its significant advantages during this special period. The system provides more oxygen to office while windows are closed. It removes bacteria and viruses and works along with air-conditioning system, creating a comfortable and healthy environment for staff to work.

1. Study Report: Impact of the Indoor Environment on Learning in Schools in Europe

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商场、办公楼是人员密集场所，空气不易流通，CO₂含量过高，二氧化碳含量高会让人感觉空气浑浊，并开始觉得头痛、嗜睡、注意力无法集中。

丹麦技术大学室内气候科学家帕维尔·沃戈茨基和大卫·怀恩的研究²显示”健康的室内空气质量可使办公室工作效率提高10%.”人们更愿意通风良好温度适宜的商场购物，空气质量虽然看不见，却是客流量多少的重要因素。

传统的排风系统解决了密闭空间中二氧化碳的含量问题，但没有很好的净化除菌功能。在流感高发季节，开着中央空调、门窗紧闭的办公室特别容易产生交叉感染。2020年新冠肺炎缓解后的复工时期，办公室中带有回风的中央空调也不建议开启，2月下旬的天气还未回暖，这样的环境让不少企业都放缓了复工的步伐。带有空气净化功能的新风系统在特殊时期的优势彰显无遗——既能够实现“关“窗通风，保证了空气中的含氧量，又能有效去除空气中的细菌病毒，与空调的完美配合，可以让员工在舒适健康的环境下工作。

1. 资料来源：研究报告《室内环境对欧洲学校学习的影响》

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