The following words and phrases when used in this chapter shall have the meanings respectively ascribed to them in this section:
shall include any device, appliance, mechanism or fan, which is designed for the purpose of allowing or causing air to be brought from the exterior of any building to the interior of any portion thereof, or cooling, cleansing or otherwise conditioning air.
shall mean any appliance which is installed or mounted or which it is proposed to install or mount on or in any building in such manner that the same or some portion thereof, shall project beyond the property line and over any public sidewalk.
shall mean any building or structure designed or used for human occupancy.
(Code 1954 § 19.22)