Odours from intensive operations are a significant limiting factor in the expansion fo the pork industry, and dust in pig housing is suspected to be the cause of work-related respiratory symptoms in pig farmers. The impact of canola oil sprinkling and a low protein diet on dust and odour emissions of grower-finisher rooms was examined. Sprinkling oil reduced total dust emissions by 76% but the effect of oil sprinkling and low protein diets did not have a clear impact on odour emissions. Based on this study, reducing the indoor dust levels does not decrease building odour emissions.