Is Your Indoor Humidity Level Healthy?
Check if your indoor humidity is in the healthy range. See humidifier or dehumidifier recommendations.
Healthy Indoor Humidity Levels
Winter: 30-40% (lower because cold outdoor air holds less moisture — higher indoor humidity condenses on cold windows). Summer: 40-50% (higher is tolerable but above 50% encourages mold). Year-round comfort zone: 35-45%. Below 30%: dry skin, nosebleeds, cracked wood furniture, increased static electricity, and viruses spread more easily. Above 50%: mold growth, dust mite proliferation, musty odors, and wood rot.
Managing Humidity
Too dry (winter problem): Whole-house humidifier ($200-500 installed), portable humidifier ($30-100), houseplants, and reducing exhaust fan use. Too humid (summer problem): Run AC (which dehumidifies), portable dehumidifier ($150-300), exhaust fans in kitchen and bathroom, and fix any water intrusion sources. A $10 hygrometer (humidity meter) lets you monitor levels — place one in your main living area.
