Section 25-7-1503 - Scope and applicability(1) Except as described in subsection (2) of this section and as modified by rules promulgated by the executive director or the commission pursuant to section 25-7-1506, this part 15 applies to the following new products: (a) Water heaters with a rated heat input capacity of two million BTUs per hour or less; and(b) Fan-type central furnaces that: (I) Require either single-phase or three-phase electric supply;(II) Are used for comfort heating; and(III) Have a rated heat input capacity of less than one hundred seventy-five thousand BTUs per hour, and, in the case of combination heating and cooling units, a cooling rate of less than sixty-five thousand BTUs per hour.(2) This part 15 does not apply to: (a) Products held in inventory in Colorado on the effective date of the applicable standard;(b) Products that were installed in manufactured homes at the time of construction;(c) Products designed expressly for installation and use in recreational vehicles; or(d) Products that do not burn fossil fuels.Added by 2023 Ch. 285,§ 9, eff. 8/7/2023.2023 Ch. 285, was passed without a safety clause. See Colo. Const. art. V, § 1(3).