C.R.S. § 25-7-412

As used in sections 25-7-411 to 25-7-413 , unless the context otherwise requires: (1) “Fireplace insert” means any wood-burning device designed to be installed in an existing fireplace which meets the Phase III standard, as such term is defined in subsection (2) of this section. (2) “Phase III wood stove” means any wood-burning device that meets the most stringent standards adopted by the commission pursuant to section 25-7-106.3 (1) or any nonaffected wood-burning device that is approved by the commission. (3) “Program area” means the portions of the five counties in the AIR program area, including Adams, Arapahoe, Boulder, Douglas, and Jefferson, and the cities and counties of Denver and Broomfield.