When it comes to having good air quality in my area the best time to catch that is in the night time. At night, the air quality in my area is the best it can possibly be. If you have a whole home air purification system or a portable air purification system you will not need it at all if you live where I do in the evening time. Usually around 7pm when the sun goes down the air quality gets super nice. In the daytime hours you can have ok air quality or you can have bad air quality. It really depends on a lot of things. One of which is the direction of the wind. This can tell a lot of what kind of air quality will be throughout the daytime hours. But lo and behold, if it is a real bad air quality day, just turn on that portable air purification system or the whole home air purification system and then wait for the night to come. Because once the night comes you will be all free and clear of any bad air quality hanging around and you will be able to take mother nature’s great air quality into your home. I really love where I live because of this. Having great air quality in the night is not something to take for granted. There are many places in the world that have bad air quality almost all of the time. So to have it nice and clean even at night is a real great thing to have and a rare find in some cases.