The level of greenhouse gas emissions from a heating or domestic hot water producing device must be less than 300 gCO2eq/kWh NCV, according to this ordinance. This effectively signals the end of new fuel-powered heating systems for residential buildings that use coal and fuel oil. The provisions of this article apply to both newly constructed structures for which building permit applications are submitted after July 1, 2022, as well as to existing buildings for which the work indicated in I is carried out after that date.