so why aren t we all scrambling to get hold of them now? that is because we care much more about how much things cost than how efficient they are, says leah robson, who has been installing heat pumps in south london for nine years. typically, gas prices are around four times cheaper than electricity prices, so effectively your efficiency, in terms of cost, is pretty much cancelled out. what is more, heat pumps operate at lower temperatures than gas boilers, so you will need to make sure your home is well insulated, consider double glazing and maybe beef up some of your radiators. add in the fact that heat pumps cost more than twice as much as gas boilers, and you realise even at current high gas prices, they work out more expensive for virtually all of us. the idea is the new grant scheme will help level up the costs just one of the reasons energy companies say lots of people are asking about them. interest s really spiked since the invasion of ukraine, because i think people are say