Packaged low pressure boiler

means a packaged boiler that is:

(1)  A steam boiler designed to operate at or below a steam pressure of 15 psig;

(2)  A hot water boiler designed to operate at or below a water pressure of 160 psig and a temperature of 250^oF; or

(3)  A boiler that is designed to be capable of supplying either steam or hot water, and designed to operate under the conditions in paragraphs (1) and (2) of this definition.