economizer

Noun

e=con=o=miz=er

WORDNET DICTIONARY

economizer(n = noun.person) economiser - a frugal person who limits spending and avoids waste; Array

is a kind of saver

has particulars: stinter

Derived forms verb economize₁, verb economize₂

economizer, n.

One who, or that which, economizes. [1913 Webster]
Specifically: (Steam Boilers) An arrangement of pipes for heating feed water by waste heat in the gases passing to the chimney. [1913 Webster]