空调是为了炎热潮湿的夏天，有凉爽的室内环境，是为了舒适，需要初装费用+运行费。
Air conditioning is for hot and humid summer, there is a cool indoor environment, is for comfort, the need for initial installation costs + operating costs.
暖气是为了在寒冷的冬天，有温暖的室内环境，是为了舒适，也需要初装费用+运行费用？
Heating is to have a warm indoor environment in the cold winter, to be comfortable, but also need the cost of initial installation + operating costs?
空气净化器是为了在这么多的雾霾天里，有洁净的空气环境，是为了健康，也需要初装费+运行费？
The purpose of air purifier is to have clean air environment in so many hazy days. It's for health. It also needs initial installation fee + operation fee.
净化器从几百几千到几万的都有，效果如何？需要擦亮眼睛来买，这个眼睛就是激光PM2.5检测仪。
Purifier from tens of thousands to tens of thousands of all, how effective? You need to polish your eyes to buy it. This eye is a laser PM2.5 detector.
净化的运行费用并不高，100瓦以下的功率，比空调便宜多少倍？加上滤网的费用，也比取暖费不知低多少？别听那些说滤网寿命一年半年的，这是要根据雾霾程度来定的，在国外可以，在海南也可以，在雾霾肆虐的地方你试试？我是1-2个月换一个，滤网100到几百，用自己的肺来过滤最省钱。
The operation cost of purification is not high. How much cheaper is the power below 100 watts, which is much cheaper than the air conditioner? And the cost of filter is also lower than heating cost. Don't listen to those who say that the life of the filter is one year and half a year. This is determined by the degree of haze. You can try it abroad, in Hainan, where the haze rages. I change it in 1-2 months, filter 100 to several hundred, and filter with my lungs to save money.
买到合格的净化器加PM2.5检测仪的结果就像寒冬有暖气，夏天有空调；雾霾天有净化的空气。
The result of purchasing qualified purifier and PM2.5 detector is like that of heating in winter, air conditioning in summer and purified air in fog and haze.