Hot water supply boiler

means a packaged boiler that is industrial equipment and that:

(1)  has an input rating from 300,000 Btu/hour to 12,500,000 Btu/hour and of at least 4,000 Btu/hour per gallon of stored water;

(2)  is suitable for heating potable water; and

(3)  meets either or both of the following conditions:

(A)  it has the temperature and pressure controls necessary for heating potable water for purposes other than space heating; or

(B)  the manufacturerʹs product literature, product markings, product marketing, or product installation and operation instructions indicate that the boilers intended uses include heating potable water for purposes other than space heating.