Flameless ration heater

A flameless ration heater (FRH) is a form of self-heating food packaging included with meals, ready-to-eat (MREs), used to heat the food. United States military specifications for the heater require it be capable of raising the temperature of an 8-ounce (230 g) entrée (American English for main course) by 100 °F (38 °C) in twelve minutes, and that it has no visible flame.

Flameless ration heater

A flameless ration heater (FRH) is a form of self-heating food packaging included with meals, ready-to-eat (MREs), used to heat the food. United States military specifications for the heater require it be capable of raising the temperature of an 8-ounce (230 g) entrée (American English for main course) by 100 °F (38 °C) in twelve minutes, and that it has no visible flame.