Farm Animal Welfare

Pig Housing Ventilation Welfare Standards

Ventilation quality in pig housing determines air quality, thermal comfort, and disease risk - all central welfare determinants for housed pigs.

Key Facts

Ammonia should not exceed 20 ppm at pig level in welfare-certified housing
Temperature variation causes thermoregulatory stress with both hot and cold extremes harmful
Good ventilation provides 4-8 air changes per hour without creating cold draughts on animals
Mechanical ventilation requires backup systems to prevent catastrophic failures
Natural ventilation through open ridge and sides can achieve excellent air quality in good designs

Welfare Considerations

Ventilation is a foundational welfare input that affects air quality, thermal comfort, disease susceptibility, and behavioral expression simultaneously. Investment in good ventilation design and maintenance delivers welfare benefits across multiple welfare dimensions.

What You Can Do

Advocate for ventilation standards in pig welfare certification schemes
Support affordable ventilation monitoring technology for pig farmers
Choose pork from certified farms with documented air quality standards