The weather is getting hot, so I'm going to buy an air conditioner.

Your bedroom is quite large. As you said, it doesn't open very much in winter. If it opens for a few hours in summer, you can buy a fixed frequency, which can save 1000 yuan. According to the size of your bedroom, you'd better buy 2P, or 1.5P, the effect will be worse. After all, the area is so large. Haier, Gree, etc. Haier's after-sales service is better.