Fragrance Oddity

There's a little sign on the air freshener in the gents' at work (bear with me here) that says 'For Commercial and Industrial Use Only'. The Commercial bit I understand - they sell lots of the stuff to businesses, that kind of deal.

Industrial though? Surely they can only mean air freshening on an industrial scale. What are they using it for? Are there people employed to walk around sewer treatment facilities spraying vast amounts of jasmine scented stuff into the air?

Tom is confused.

Again.