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Hot water boilers have a hot water distribution system instead of a steam system.

Hot water boilers have a hot water distribution system instead of a steam system.

Conduction is heat transfer that occurs when molecules in a material are heated and the heat is passed from molecule to molecule through the material.

The most common steam pressure gauge operates by the movement of a ___.

Although boiler water level is maintained with a feedwater pressure gauge, the boiler water level must still be routinely checked by a boiler operator.

Conduction is heat transfer that occurs when molecules in a material are heated and the heat is passed from molecule to molecule through the material.

The two classifications of air conditioners are package air conditioners and split-system air conditioners.

A(n) ___ is matter that contaminates air, water, or soil.

In an air atomizing burner, steam and fuel are discharged to the burner for combustion after the flames reach the end of the combustion chamber.

A hot water heating system operates at ___.