Emissions of gases and particulate from swine housing have come under the scrutiny of governmental regulatory agencies and environmental groups in the United States. This study compared air emissions from adjacent tunnel ventilation fans in a commercial farrow-to-wean swine building near Stephens, GA. One tunnel fan had a wet scrubber (WS) air cleaning device attached to its exhaust cone while the other tunnel fan’s (CTF) exhaust air was untreated. The WS device increased resistance to air flow from the fan that resulted in a 23% decrease in air flow rate compared to the CTF. The WS lowered respirable particle count concentrations between 5.4 and 15.3%. Comparisons of gravimetric particle concentrations for total and respirable particles indicated higher concentrations emitted from the WS. Ammonia concentrations emitted from the WS were lower than those measured from the CTF. Analysis of effluent from the WS showed much higher levels of ammonia, total suspended solids, total nitrogen and total phosphorus compared to water samples prior to entering the WS. Odor intensity analysis showed mixed results. Mean endotoxin concentrations were 18% lower using the WS compared to the CTF.