Editing Shooting range (section)

=== Air ===
[[File:Lead exposure at firing ranges—a review.pdf|thumb|Shooting ranges carry a risk of [[lead poisoning]] and are a public health concern]]
Lead and other pollutants are regulated by ventilation in a range. The configuration of the supply and exhaust air systems is critical for proper operation. Interlocks that enable both the supply and exhaust fans to be working should be designed to ensure proper operation. The range's exhaust system eliminates dirty air.
The air velocity down the range is determined by the exhaust flow rate, but it has no bearing on the airflow pattern at the firing line. A minor negative pressure in the range can be maintained by exhausting 3 to 7% more air than is supplied. The negative pressure of -0.04 + 0.02 inches water gauge should be maintained for ranges. Energy recovery systems should be considered because of the huge amount of air being exhausted. Single-speed fans, not multiple-speed fans, should be used. To demonstrate proper exhaust system function, indicators (static or velocity pressure) for flow monitoring are a good idea. 

Outside air must make up for the lost airflow. The distribution of supply air is crucial in assessing the ventilation system's effectiveness.
Air supply systems are designed to spread air equally over the firing range's distance. Airflow at the shooting line can be unstable if it is not uniformly dispersed, allowing lead and other pollutants to be brought back into the shooter's breathing region. Supply air should be added as high as possible in the range.