"Building", a building or multiple buildings on a parcel, or any grouping of buildings designated by the department as an appropriate reporting unit for the purposes of this section.
"Energy", electricity, natural gas, steam, hot or chilled water, heating oil, propane or other products designated by the department that are used for heating, cooling, lighting, industrial and manufacturing processes, water heating, cooking, clothes drying or other purposes.
"Gross floor area", the total floor area contained within a building measured to the external face of the external walls.
"Large building", a building with at least 20,000 square feet of gross floor area; provided, however, that the department may establish by regulation a lower threshold for a building to be considered a large building under this section.
"Owner", the owner of record of a building or a designated agent thereof including, but not limited to, an association or organization of unit owners responsible for management of a condominium, the board of directors of a cooperative apartment corporation or the net lessee of a building subject to a net lease with a term of not less than 30 years, inclusive of all renewal options.
Mass. Gen. Laws ch. 25A, § 20