This is why we created Lun. Every gas boiler's consumption emits about 2tCO2 per year - and there are about 90 million buildings in Europe that could be heated using heat pumps instead, with huge benefits for energy efficiency and carbon emissions.
As you said, it's a hard problem.
Luckily, politicians and bureaucrats are passing more and more legislation that will force the fossil fuels out of heating over the next decade. We see it as our job to make sure it's going to happen in real life by being the glue between all parties in the value chain (consumers, OEMs, installers, utilities, governments, financial institutions).
And we're looking for great people ;) careers.lun.energy