Air quality at low outdoor temperatures in Norwegian horse stables

K. E. Bøe, G. Dragsund, G. H.M. Jørgensen, E. Fabian-Wheeler

Research output: Contribution to conferencePaperpeer-review


The aim of this study was to investigate the variation in air quality on days with low outdoor air temperatures in Norwegian horse stables. A total of 19 insulated, mechanically-ventilated stables with horses kept inside during the night were included in the study. In almost all of the stables (n=18) ventilation fans were operated during the night. In eleven of the stables the exhaust fans had a manual step by step regulation whereas in the remaining eight stables the exhaust fans were regulated by a temperature-setpoint thermostat. Fresh air inlets however, were highly variable in design and management leading to potential for ineffectiveness of ventilation functions. In four of the stables there were no specific air inlet systems, in five stables the exit door was used as the only air inlet. Mean outside air temperature was 0.0 ± 0.8 °C and mean indoor air temperature was 7.5 ± 0.5 °C. Mean level of CO2 was 1800 ppm and only in one stable CO2 exceeded 3000 ppm. Mean inside ammonia (NH3) was 1.3 ppm and only in one stable the level of NH3 exceeded 5 ppm. The total dust concentration was 0.69 ± 0.19 mg/m3 and in two stables the dust concentration exceeded 1.0 mg/m3. Half of the stables visited had a lower calculated air exchange rate than recommended. Still, the majority of the stables maintained acceptable air quality, with ammonia and dust levels within recommended levels.

Original languageEnglish (US)
StatePublished - 2018
Event10th International Livestock Environment Symposium, ILES 2018 - Omaha, United States
Duration: Sep 25 2018Sep 27 2018


Conference10th International Livestock Environment Symposium, ILES 2018
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology


Dive into the research topics of 'Air quality at low outdoor temperatures in Norwegian horse stables'. Together they form a unique fingerprint.

Cite this