CO2, NH3 and H2S were measured under summer and winter conditions in 3 pig houses: (1) slatted floor, forced ventilation, underfloor slurry storage, (2) solid floor, separate slatted defaecation area, natural ventilation and (3) slatted floor, forced ventilation, underfloor slurry storage with oligolytic treatment. All 3 houses met CIGR recommended limits. However, the slurry lagoon beneath the slatted floor allowed emission of malodorous gases with consequent problems with occupants of nearby housing. Further research is recommended.
