Tell us about yourself!
Only for a suitcase-sized bunch of clothes at a time. It sounds like your problem is bigger than that. I used it a couple of times when my employer made me stay in a hotel that I know has bedbugs (I found one in my room). I used bedbug-safe practices (do not put luggage on the bed - always use the luggage rack - make sure you don't transfer bugs from the bed to your luggage in your pyjamas etc) and then I also used this. I never had bedbugs in my home afterwards so I don't know if it's the bedbug-safe practices or the heat from this device that protected me.