Heat pumps are heralded as a super efficient and cost effective way to heat our homes. But what exactly is inside this big box that apparently works like a backwards fridge and how exactly does a heat pump work?! We sent our resident scientist, Dr Helen Czerski to find out and she did not disappoint! Cue marble runs, air dusters and bike pumps as she demystifies the inner workings of a heat pump! If you still have questions, please let us know in the comments!

00:00 Introduction
00:30 What is a heat pump?
01:00 The Second Law of Thermodynamics
02:52 Getting heat to flow into the house!
03:19 Cold to colder!
05:23 Hot to Hotter!
05:51 Putting it all together!
07:39 Coefficient of Performance - 400% efficient??
09:05 Heat redistribution NOT heat generation!
09:25 Concluding thoughts

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