The floor area of the housing unit that is enclosed from the weather and heated. Basements are included whether or not they contain finished space.Garages are included if they have a wall in common with the house. Attics that have finished space and attics that have some heated spaceare included. Crawl spaces are not included even if they are enclosed from the weather. Sheds and other buildings that are not attached to the house are not included. "Measured" area means the measurement of the dimensions of the home, using a metallic, retractable, 50-foot tape measure. "Heated area" is that portion of the measured area that is heated during most of the season. Rooms that are shut off during the heating season to save on fuel are not counted. Attached garages that are unheated and unheated areas in the attics and basements are also not counted.