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Indoor relative humidities should be kept above 30% to reduce the likelihood of the occupant's nasal passages drying out, especially in winter. [38] [41] [42] Air conditioning reduces discomfort by reducing not just temperature but humidity as well. Heating cold outdoor air can decrease relative humidity levels indoors to below 30%. [43]
Much has been made about the dangerous pandemic pathogens flying around the air outside of our personal bubbles this year, but in the cold months ahead, the safety of indoor locations may be a ...
When the humidity level indoors is too low, it can make the home feel uncomfortable and may contribute to health-related issues, like dry hair, chapped lips, dry skin, dry eyes, and headaches.
The recommended level of indoor humidity is in the range of 30–60% in air conditioned buildings, [34] [35] but new standards such as the adaptive model allow lower and higher humidity, depending on the other factors involved in thermal comfort. Recently, the effects of low relative humidity and high air velocity were tested on humans after ...
Temperatures lower than 16 °C (61 °F) with humidity above 65% were associated with respiratory hazards including allergies. [13] [14] The WHO's 2018 guidelines give a strong recommendation that a minimum of 18 °C (64 °F) is a "safe and well-balanced indoor temperature to protect the health of general populations during cold seasons".
Indoor heating lowers humidity levels and causes dry air. In the winter, using a cool-mist humidifier near your citrus tree can help prevent leaves and flowers from dropping off too soon.