As nouns the difference between preheater and economizer
is that preheater is an engineering device that preheats a material prior to some other process while economizer is a person who avoids waste.
preheater
English
Noun
(
en noun)
An engineering device that preheats a material prior to some other process.
economizer
English
Noun
(
en noun)
A person who avoids waste
A heat exchange device in a boiler that improves efficiency and saves fuel
Related terms
*economic
*economics
*economy