Pistol Range ventilation

GEO_3

Trying to find standards for range ventilation. Been wading through EPA and NIOSH sites but haven't got it . Anyone have a shortcut?

GMcD

Try American Air Filter

AAF had some good stuff and I think a company called Detroit Armour had some info as well as Savage (the Savage Scroll trap source) As I learned from doing an indoor range some time ago, the key is what kind of bullet trap they intend to use. The scroll trap is the one that produces the least lead particulate pollution, leaving you to just deal with the gunsmoke ventilation. The rule of thumb I recall was that about 1/3 of the exhaust air quantity (exhaust inlets) were just downrange about 20 feet from the shooting position, and the rest of the exhaust pick ups were at the bullet trap. The total airflow in the range is sized for a minimum of 14-15 air changes per hour, with a nominal downrange air velocity of 50 feet per minute. This is critical: the supply air must be behind the shooting positions and supplied in a very low velocity manner, not more than 75-90 feet per minute to insure laminar airflow around the shooters. Typically a whole perforated wall is used about 10 feet behind the shooting positions. The air system is a whole 'nother ball of wax- Once through? Recirc? Heat recovery? I recall seeing an article from the last couple of years where an indoor gun range in Alaska used a radiant slab heating system incorporated as part of the whole shebang. Have you done some google searches on "gun range ventilation"? The air quality standards that I recall dealing with were the airborne lead particulates and the CO/NOx/CO2 levels. Found these links with a quick search: http://www.careyscentral.com/indoorrange.html
www-nehc.med.navy.mil/od/Documents/tm6290_99-10.pdf

Kevinj

NRA

The NRA has a complete range guide. You will still have to comply with the local codes.

Jon_2

Pistol range exhaust system

Did one of these about 15 years ago. Mr. McDonell is correct. I recieved a lot of help from the NRA tech. staff. They have a lot of good info on indoor range ventilation systems. Remember you can not exhaust nor recirulate the air from the range unless it goes through some sort of scrubber to remove the lead particiles. I do not have any of the stuff left from that job, but I remember it was an extremely costly job.

GEO_3

Thanks

Was thinking radiant for the heatsource and heat recovery for the ventilation but couldn't nail down the air changes. This info will help.....Thanks

Matt_9

Industrial Ventilation

There is a diagram in Industrial Ventilation of an indoor pistol range. It shows air being supplied behind the shooters, into a "plenum" with double, .025" pegboard face. The air is exhausted behind the target end of the range.

Minimum airflow is listed as 50 x H x W, where H is the height of the opening that the shooters look through (above the counter) and W is the room width, but not less than 20cfm/ sq. ft of room cross sectional area.

LEAD PIPE

be careful

We had one installed and a few months after it was done we started so get a gun powder smell in the building. Someone came in and tested and found problems with the system. It had to be re-done and cost the contractor big $. I wish I could tell you what the problem was but it was 5 years ago and I wasn't paying that much attention. I only remember I felt bad for the guy. I know they are very strict with the venting do to the lead content.

Good luck.

JimGPE_3

AAF

American Air Filter is the best source I know of. They have a great book that shows you how to do it with 100% outdoor air and another way with mostly recirculated air. Depends on whether you want low first cost or low operating cost.

GEO_3

I'll giv them a try......Thanks