Can confirm. Over here 20 years ago you would be laughed out of the room if you suggested to use an air-source heat pump to heat a house. Nowadays they are the

Can confirm. Over here 20 years ago you would be laughed out of the room if you suggested to use an air-source heat pump to heat a house. Nowadays they are the norm, and ground source are a minority. It also helps that building insulation standards have crept upwards, so you don't need as much energy to heat a modern building, making it a win for the lower capital cost of an air source system.