"Recreational vehicle" is a camp car, motor home, travel trailer or tent trailer, with or without motive power, designed for human habitation for recreational or emergency occupancy, with a living area less than 220 square feet, excluding built-in equipment such as wardrobes, closets, cabinets, kitchen units or fixtures, bath and toilet rooms and is identified as a recreational vehicle by the manufacturer.
(`78 Code, § 17.04.504.)