Heat in the air, ground or water can be very useful for powering places.
How does it work? Ambient heat is collected by pipework or an extractor. This heat is then collected with something called a heat exchanger - basically a fridge in reverse. From there it’s taken to an underfloor or radiator heating system.
Which all sounds a bit complicated... but not according to our environmental advisor, Tony Price: ‘Once they’re in, they just sit in the corner and work’.