HMCharacteristicValueAirQuality.good The air quality is good. Declarationcase good See AlsoAir QualityHMCharacteristicValueAirQuality.unknownHMCharacteristicValueAirQuality.excellentHMCharacteristicValueAirQuality.fairHMCharacteristicValueAirQuality.inferiorHMCharacteristicValueAirQuality.poor