Heat pumps have a GHG problem. There's a solution on the way.

Large heat pumps could be the future, but high costs and technical hurdles slow the breakthrough.

In Germany, the building sector emits around 40 percent of the CO2. To make it fall more clearly than before, heat pumps also play in

Heat pumps have a GHG problem. There's a solution on the way.

Heat pumps are essential for ditching fossil fuels. The appliances are many times more efficient than even the best gas furnaces, and they run on electricity, so they can draw power from renewables like wind and solar. But the very thing that makes them such an amazing climate solution is also their biggest challenge. A common refrigerant called R-410A pumps through their innards so they can warm and cool homes and offices and anything else. But…