In this chapter:
I. "New" shall include any unit not previously sold or occupied as a dwelling unit.
II. "Prefabricated" shall mean construction materials or assembled units fabricated prior to erection or installation in a building or structure, but shall not include manufactured housing as defined in RSA 674:31.
III. "Presite built housing" means "presite built housing" as defined by RSA 674:31-a.