preheater

As nouns the difference between heater and preheater

is that heater is a device that produces and radiates heat, typically to raise the temperature of a room or building while preheater is an engineering device that preheats a material prior to some other process.

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.

As a noun preheater

is an engineering device that preheats a material prior to some other process.

As an adjective pretheater is

before attending the theater (especially of drinks or a meal).

As nouns the difference between preheater and reheater

is that preheater is an engineering device that preheats a material prior to some other process while reheater is one who, or that which, reheats.

As a verb preheated

is past tense of preheat.

As a noun preheater is

an engineering device that preheats a material prior to some other process.

As nouns the difference between preheater and preheader

is that preheater is an engineering device that preheats a material prior to some other process while preheader is material that precedes a header.