I work in the Gov't-The cleaning contractors use whatever vac they supply.typically Sanitaires.At the place I work for presently its Hoovers.I would imagine the Lindhaus is purchased by the Gov't.I would have to look at a GSA catalog and see if they are listed.Most of the cleaning in Gov't buildings is done by contractors-under the "privatesion" acts.the cleaning contractor supplies his own equipment.I would imagine the Lindhaus is used in the medical facilities.