C.R.S. § 9-4-117: New heating boilers and hot-water supply boilers installations.

No heating boiler or hot-water supply boiler, except those exempt by this article, shall be installed in this state unless it has been constructed, inspected, and stamped in conformity with the rules for construction of low-pressure heating boilers of the A.S.M.E. boiler and pressure vessel code and is approved, registered, and inspected in accordance with the requirements of this article.