Tried to explain a heat pump to my cousin at a family cookout

This was in my backyard in July, and he was flipping burgers. I mentioned we were looking at getting one to replace our old furnace. He stopped, spatula in hand, and said, 'Wait, so it's an air conditioner that runs backwards? That's just a fridge with a fan.' I had to admit he wasn't totally wrong, but explaining the coefficient of performance while he was checking burger temps was a lost cause. Has anyone else had a surprisingly simple take on a complex system stop you in your tracks?

2 comments

2 Comments

jenkins.spencer1d ago

Was he wrong though? (I mean, a fridge is basically a small heat pump for a box.) That's actually a pretty solid way to get the basic idea across before you dive into the nerdy details.

eric_carr1d ago

That's a fair point from @jenkins.spencer, but calling it a fridge misses the scale. The real trick is moving enough heat to warm a whole house when it's freezing outside, not just a box of food. How do you even start to explain that part without an engineering degree?