[Don W]

You sound like a lefty, with that "Well I don't see know nothing about it so it doesn't exist" bent.

Have you ever heard of a little thing called a Refinery? They are constructed by guess who?
Then there are larger structures: My hospital has bought 3 new boilers in the last 5 years to heat the entire campus (34 acres, 13 buildings). The other large hospital in my city has bought 2 in the last 4 years. The naval base here just bought 3 new ones 9 years ago.

If you see a large building, the odds are pretty good that there is a boiler in there for at least domestic hot water, but usually building heating as well.

[Red Badger]

I was making a joke about the drink, and I live in Florida, where we don’t have a lot of heating requirements..................

[eastforker]

Boilermakers also build the big petroleum storage tanks, also heat exchangers and furnaces.