Heat pumps take centre stage as coal boilers get the cold shoulder

When you think of boilers, you might conjure up images of a bygone era, with soot-covered workers heaving shovelfuls of coal into roaring furnaces. But did you know that coal boilers are still a significant part of the energy mix in New Zealand - heating schools, hospitals, and even helping power the dairy industry? WSP mechanical engineer Bernhard Schmiedeke looks at how heat pumps are taking over.