Anyone have experience operating the M20A1 Simplified Collective Protective Equipment (CBRN Shelter)?

I just set one of these up for the first time this week in side a large room. the main reason it needs to be set up inside a building is because it offers no cover from the elements by itself. You can bypass the filter by just hooking up the blower to the hose line and straight into the unit. My problem is that I haven't found much detailed information on shelf life of the unit itself or the filters, i.e. how often they should be changed out when operating in a chemical environment. Also SOP's for use and deployment have been almost impossible for me to find. Any suggestions

Nope, too new for me. We stripped down and deconed in kiddy pools for hot lines. Looks like a nice piece of gear. Why would it have to be used indoors? Good luck finding a structure you can inflate that beast in!