The objective of this experiment was to determine the net energy (NE) of full-fat rice bran (FFRB), corn germ meal (CGM), corn gluten feed (CGF), peanut meal (PNM), and sunflower meal (SFM) using indirect calorimetry (IC) and prediction equations and test the hypothesis that heat production was affected by diet characteristics.Twelve growing barrows (initial BW =32.4 ± 3.3 kg) were allotted to a replicated 3 × 6 Youden square design with 3 periods and 6 diets.In each square, there were 1 corn-soybean meal basal diet and 5 test diets containing 29.25% FFRB, 29.25% CGM, 24.38% CGF, 19.5% PNM, or 29.25% SFM added at the expense of corn and soybean meal.During each experimental period, pigs were individually housed in metabolism crates for 16 d, which included 7 d to adapt to feed, metabolism crates and environmental conditions.On d 8, pigs were transferred to open-circuit respiration chambers for measurement of O2 consumption and CO2, and CH4 production.