With the advent of the summer occupancy, it means the opening of the “summary-day model” and the “summary-day economy” with the main demand of “cold-powered”, “clearing, trenching” are also on the verge, and the curtains such as air conditioning, typhoric fans and refrigerators are also prepared in advance. After all, in the heat of pneumonia, no one wants to have a continuous flow of fresh air for the indoors, while at the same time guaranteeing an indoor temperature “clearing”. If you have ...