Man that's an old style. I remember my father had one of those back in the 70's.
Lots of experience with ulv foggers but they were the B & G style. We backed way off on their use, have fired one up in probably a decade. We must have half a dozen of them sitting around.
They work good, almost too good. They will propel small particles into the air for hours. Not good to breathe, those particles will get down in your lungs.
You'll need a respirator as will anyone that enters the air space.
They also don't work well for air ducts. You just can't get enough product in without the risk of over wetting and the ducts leaking & water staining drywall.
To be effective the solution needs to stick to all surfaces for 10-15 minutes. You'll be ruining some drywall before you wet it enough to "stay wet for 10-15 minutes".