Section 32Q. As used in sections thirty-two A to thirty-two P, inclusive, the words “manufactured home” shall mean a structure, built in conformance to the National Manufactured Home Construction and Safety Standards which is transportable in one or more sections, which in the traveling mode, is eight body feet or more in width or forty body feet or more in length, or, when erected on site, is three hundred twenty or more square feet, and which is built on a permanent chassis and designed to be used as a dwelling unit with or without a permanent foundation when connected to the required utilities, and includes the plumbing, heating, air conditioning, and electrical systems contained therein.