There has never been a better time to install a heat pump. Indeed, there may never be another quite as good. The arrival of new “optimisers” now means heat pumps can undercut boilers on running costs, ...

Heat pumps have annually outsold gas furnaces for several years now, and with the recent introduction of more high-efficiency, cold-climate, air-source heat pumps, that trend is likely to continue.

Dumping apartment buildings' carbon-powered climate systems can mean massive costs, a huge challenge for lower-income housing. And environmentally friendly air-source heat pumps can struggle to work ...