HMCharacteristicValueAirQuality.fair The air quality is fair. Declarationcase fair See AlsoAir QualityHMCharacteristicValueAirQuality.unknownHMCharacteristicValueAirQuality.excellentHMCharacteristicValueAirQuality.goodHMCharacteristicValueAirQuality.inferiorHMCharacteristicValueAirQuality.poor