Oh my, yes. But the basic technology-a BIG plastic bag, a hepa filtered vacuum cleaner exhausting into it, assorted batteries, inverters, solar panels, generators-it all looks like something that we
slap together for a bunch less. If the air moving device was big enough, the bag would only have to be tight enough to maintain positive pressure. I guess someone is buying this stuff, somewhere. Probably elected officials, using our tax dollars. *sigh*