There is only one health filter.

What you want to say is that there is a filter screen about 20 cm long in the hanging screen of the air conditioner. A strip object about five centimeters wide should have little difference in size. The big one is not much bigger, and the small one is not much smaller. First of all, his name is not filter cloth, but plasma sterilization net. Or negative ion sterilization. Or activated carbon. In short, their function is sterilization.

Actually, it doesn't matter if you put it on the left or right. Put it on. Besides, I don't know how many years your air conditioner has been used. If it is used for more than three years, then the sterilization net will lose its function, and it is useless to install it or not. Manufacturers don't have accessories for this thing, and even if they do, it's hard to buy them. Because the manufacturer will not use this as an accessory. Only in after-sales service will there be this thing. Even if you can buy this thing, it is not very expensive, especially cheap, usually you can buy it for ten dollars and eight dollars.