Eli5 How can one small flame in a boiler be enough to warm a whole houses central heating system?

Question

Eli5 How can one small flame in a boiler be enough to warm a whole houses central heating system?

In: Engineering

Answer 1

Only the pilot light is a “small flame”, but the pilot light isn’t what is actually heating the water that then heats the rest of the house. There is a whole set of burners that get lit by the pilot light when the burners turn on.