I’ve mentioned earlier the level of energy efficacy of heat pumps. Here is an example of the level of fiscal efficacy of heat pumps. The fronted lede:
A two-year project to convert a public housing building to an electrically powered heat pump system is nearing completion on the Upper West Side. The 58-year-old 20-story tower at 830 Amsterdam Avenue (100th Street), part of the New York City Housing Authority (NYCHA) Frederick Douglass Houses development, is being retrofitted to provide heating, cooling, and hot water for residents—and to serve as a possible template for converting more of the 2,410 buildings NYCHA maintains citywide.