What is a good indoor temp and humidity combination?

Answer 1

There is a concept called saturated water vapor. In short, if the room temperature is high, there will be a lot of water vapor in the air, and vice versa. That is to say, in a natural state, indoor humidity tends to be high in summer and low in winter. But even in summer there is a possibility of low indoor humidity because air conditioning has the function of converting heat into moisture and expelling it. Therefore, even in an air-conditioned environment, we have to consciously control the appropriate humidity.

Using humidifiers to adjust the humidity indoor. Well-known brands such as Dyson, Keecoon [large capacity above 2 gallon], Panasonic, etc.