Home Humidity Control Guide

Ideal Range

30-50% relative humidity. Below 30% causes dry skin, static, and cracking wood. Above 50% promotes mold, dust mites, and condensation.

Too Dry (Winter)

• Add a whole-house humidifier to your furnace ($200-$500 installed)
• Portable humidifiers work for single rooms
• Keep humidifier pads clean to prevent mold

Too Humid (Summer)

• Your AC is a dehumidifier — make sure it's sized correctly
• Use bathroom and kitchen exhaust fans
• A standalone dehumidifier works for basements
• Check for air leaks that let humid outdoor air in

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