I would suspect that if you were doing a hotel room you'd either do it after the room was completely cleaned, or after the rooms were stripped of the dirty sheets, towels, etc and before new linens were applied. You would probably need one machine for each maid, or team of maids if they were working as a team. It's certainly a good selling point, but the operators would have to look at the cost per unit of doing it. Most nicer hotel rooms are at least the size of most hospital rooms, so 20 to 30 minutes with the unit would probably be needed to do it right.
I don't know that hotels are typically blamed for spreading infections, the way hospitals are, as well as fully contained places like ships and planes, so I suspect they'd resist the costs unless they can be brought down dramatically. What would probably be more ideal would be something like an aerosol flee bomb that could be triggered after cleaning the room and removed perhaps an hour later. If the company could make such a device that could be filed, then pressurized, then discharged on leaving it would be an ideal vehicle as a single unit could probably recharge hundreds of the individual aerosol containers daily. This aerosol might not be as effective as what's used in a hospital room, but it shouldn't need to be.
Gary
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