This whole heat pump area deserves a thread of its own. The son in law has just finished his first year as a refrigeration apprentice. The guy he is working for seems super smart.

The son in law went back to school for a year at a low tuition cost of 8k first before starting. It may be the highest paid trade out there today if you really know what you are doing.

A first year apprentice gets paid little. It is more important to get you foot in the door. Where even a second year apprentice is in very high demand in this region.