Flameless Ration Heater
Flameless Ration Heater

A flameless ration heater, or FRH, is a water-activated exothermic chemical heater included with Meals, Ready-to-Eat (MREs), used to heat the food. Specifications for the heater required that it be capable of raising the temperature of an average 200 gram entree by 38°C in ten minutes, and that it has no visible flame.

The ration heater contains finely powdered magnesium metal, alloyed with a small amount of iron, and table salt. To activate the reaction, a small amount of water is added, and the boiling point of water is quickly reached as the reaction proceeds.


Ration heaters generate heat in an electron-transfer process called an oxidation-reduction reaction. Water oxidizes magnesium metal, according to a following chemical reaction.

When water is added to a ration heater, it dissolves the salt to form a salt-water electrolyte, thereby turning each particle of magnesium and iron into a tiny battery. Because the magnesium and iron particles are in contact, they become thousands of tiny short-circuited batteries, which quickly burn out, producing heat in a process the patent holders call “Super corroding Galvanic Cells”.

The FLAMELESS RATION HEATERS, on offer as an option from HOTG-MRE, are manufactured in China, and are ordered as a special import for any specific order.

Our Chinese manufacturer, manufactures currently for the Russian Army, amongst other key military globally.
ENquire re the offering and the price difference, to the current Fuel Tabs, that are supplied in our standard MRE packs, as these FRH, are specifically imported.