One thing a lot of people do not talk about is the fan setting on the thermostat of their central heating and air conditioning system. This comes in good use if it is not hot enough to warrant air conditioning, but it is still a little warm to where you need a fan. By turning on the fan setting of the central heat and a/c unit, you can get the outside air pumped through the air vents. If you have great air quality in your area this is a good thing. However if you have bad air quality you may want to think twice about using this method. Because it will make your home worse off than it is. In that case you may just want to either buy a floor fan or get some kind of air purifier. Maybe a whole home air purification system could work because that would clean the bad outdoor air as it passed through the air vents. But if you did not know, the cost of whole home air purification systems are outrageous. So unless you have a lot of money, you may want to skip that idea all together. Maybe buy a portable air purification system instead. Or even a portable air conditioning system. But the air quality in my area is wonderful, so I can use the fan feature on the thermostat of the central heating and air conditioning system to match the outside weather and bring it into my home. It is pretty darn refreshing when the temperatures are just right. I just thought I would talk about this since no one ever does.