You can also deliver heat more efficiently using heat pumps which use a smaller bit of high grade energy like electricity to move heat from your garden into your house.
你还可以用热能泵更高效地将暖气输送到楼房的各处 而这种机器只消耗一点高端的能源，如电 就能把你花园里的热能输送到你的房子里面去。