Questions about example sentences with, and the definition and usage of "Furnace"

A: In English, the word “hot” can be used as a replacement for the word “large” sometimes.
A furnace is something very hot.
So this expression means large ego.
Or alternatively, it refers to somebody who’s ego grows like a raging fire.

ファーネス＋エゴ

英語では、「熱い」という言葉を「大きい」という言葉の代わりとして使うことがある。
炉はとても熱いものです。
ということで、この表現は大きな自我を意味します。
あるいは、エゴが猛火のように大きくなっている人を指すこともあります。

A: Something that heats houses, smelts ores or produces steam.

A: In England we would call it the boiler room, but more likely the utility room. It's where the appliances are installed.

Americans say "furnace", we say "boiler".

A: it is a oven-like structure for burning, smelting and casting metals, e.g. gold

A: ‘The furnace is hot, be careful around it’

A: The furnace produces heat which keeps the house warm.
His car was so hot it felt like a furnace.

A: Littlemissc is correct.

A furnace just is a big machine that produces heat. It is usually in the basement or utility room of a house. If you show a guest your house you would not bother to show him the furnace.

A hearth is the part of a fireplace where the fire is. Family and their guests often get together there, and it is considered a nice, cozy place for people to gather near.

A: A hearth is the structure in front of a fire place. Usually made of stone or brick and resembling a raised bench that spans the front of the fireplace. A furnace is a self contained heating device. The heat source for a centralised heating system. Like those found in apartment building or family home.

A: No... completely different! Townsend is using the pills to get more energy/feed his addiction (stoking up the furnace would mean something along the lines of "feeding the beast" - the beast being his addiction.

A: There isn't any difference.

A: Check the question to view the answer

A: × Could you look at it and check?
✓ Could you take a look at it?

or "Could you check?"

A: Your picture is a furnace. This is what a fireplace looks like.
But there's a thing called a Furnace Fireplace (Decorative Furnace) so it just looks like a fireplace when it's not. Maybe that's what the character was talking about?