Combustion heats of waste products from processing the sunflower seeds (husk, husk briquettes, husk pellets, sharp and various types of oilcake) and wheat-growing (straw, straw pellets, various kinds of bran and by-products from the cleaning of grain) as well as of conventional fuels (wood pellets, sawdust, energy willow, coal and culm) were detd. by using a calorimetric bomb. For all the tested materials, the moisture, dry residue, ash, and volatiles matter contents were detd.