ELI5: Explain Like I'm 5

Hot tube engine

Hey buddy, do you know what a car engine is? It's the big thing in the front of a car that makes it go. Well, a hot tub engine is kind of like that, but for a hot tub.

You know how when you're in a hot tub, the water is nice and warm? That's because there's something called a heater that makes the water hot. And the hot tub engine is what powers that heater.

The engine is like the heart of the hot tub. Without it, the water wouldn't get warm and you wouldn't be able to enjoy the hot tub.

There are different kinds of hot tub engines, but they all work pretty much the same way. They use fuel, like gas or propane, to power the engine. The engine then uses that energy to generate heat, which is what warms up the water in the hot tub.

So there you have it, buddy. A hot tub engine is just like a car engine, but instead of making a car go, it makes a hot tub warm and cozy. Pretty cool, huh?
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