Final argument....
Boilers put out steam, not hot water. They cannot be used for a HLT or providing any kind of water to a brewery because they do not put out water. They can only be used for heating.... I have a big boiler, I know this.
Not true.
Fact: A low pressure boiler is defined as being
capable of operating at a minimum 15 psi for steam and
up to 160psi for water and
capable of maintaining a water temperature of
up to 250*F and
capable of operating in a closed loop.
This is the criterium for cetification as a boiler. This is NOT the criterium for operation.
Commercial Kitchens, Hotels, and some other industries often use Certified Boilers in place of Hot Water Heaters because of the capacities. Thus, they must be installed and inspected as such.
I have the International Building Code, International Residential Code, International Mechanical Code, and International Plumbing Code that all define the differences between Hot Water Heaters and Boilers.
I don't need to own a boiler to know, I know the Internationally enforced minimal facts.
Furthermore, there are only about 4 major global manufacturers of water heating appliances that distribute under dozens, if not hundreds, of brand names. The design and operational distinctions between Residential Use and Commercial use appliances are typically only distinguished by operating pressures, BTUh, and certifications. Meaning the 50 gallon tank in my closet is only a water heater because it is not fitted with the 9 billion btuh (a joke) burner assembly and thus is not certified as a boiler.
My apologies OP. Fact discredited by opinion annoys the crap out of me.