Energy consumption in animal production is important issue, which is associated with CO2 emissions as well as involved in the maintenance of internal animal house and performance of animals. Therefore, a preliminary study was undertaken to investigate potentiality of conventional, geothermal and ground channel system house on energy consumption and CO2 emissions as a main focus of study; where additionally it was investigated internal house temperature, relative humidity, odorous gas concentrations, microbial concentrations and performance of growing pigs. Both geothermal and ground channel system substantially reduced the energy and emitted lower CO2 emissions (28% and 37%, respectively) relative to conventional system house (P<0.05). Internal temperature was found lower in ground channel house compared to conventional and geothermal house; however, relative humidity was found higher in ground channel house in comparison to conventional and geothermal house (P<0.05). Odorous gas concentrations (NH3, H2S and SO2 ) was significantly lower in geothermal and ground channel house compared to conventional house (P<0.05). Total microbes and aciduric bacteria was significantly lower in geothermal and ground channel relative to conventional house; whereas, mold count was higher in ground channel than the geothermal and conventional house (P<0.05).Although weight gain of individuals was somewhat higher in geothermal and ground channel house, no significant differences were observed on growth performance among houses. In conclusion, geothermal and ground channel houses are potential to save energy consumption and reduce CO2 emissions; while able to substantially suppress odorous gas emissions and microbial concentrations without negative impact on performance of growing pigs.
