The air in any shooting range is by EPA to be turned over every hour. That means that all the air in the range has to be replaced every hour. If you are at a range and it is smokey, it is time to go. You should be able to see the smoke being pulled out of the place. That is why most inside ranges aren't heated. The old air has to be pulled out and new air brought in and you loose all the heat you had with the air going out.
The range I went in Miami, Florida didn't have filters. They just turned over the air. The place I go to in Kentucky say they have filters and change them every 60 days. I have no idea if that is true. It is just what I have been told.
Now shoot outdoors, and none of those problems, or the compressed shock waves from the dude rapid-firing his .44 mag in the next bay.
Real big difference between CFM and actually controlling the airflow.The air in any shooting range is by EPA to be turned over every hour. That means that all the air in the range has to be replaced every hour. If you are at a range and it is smokey, it is time to go. You should be able to see the smoke being pulled out of the place. That is why most inside ranges aren't heated. The old air has to be pulled out and new air brought in and you loose all the heat you had with the air going out.
The range I went in Miami, Florida didn't have filters. They just turned over the air. The place I go to in Kentucky say they have filters and change them every 60 days. I have no idea if that is true. It is just what I have been told.