The Town of Ellington, by the adoption of this
article, exempts from taxation any building or addition to a building,
the construction of which is commenced on or after October 1, 1976,
and before October 1, 1991, which is equipped with a solar energy
heating or cooling system, to the extent of the amount by which the
assessed valuation of such real property equipped with the conventional
portion of the heating or cooling system, exclusive of any portion
of such system related to solar energy, provided that this exemption
shall apply only to the first 15 assessment years following construction
of such building or addition, in the manner of and as provided in
§ 12-81(56)(a), (b) and (c) of the Connecticut General Statutes.