Lower outdoor humidity and heating systems cause dryer air indoors in winter. Air that's too dry can lead to dry sinuses, skin, and lips—plus warping and creaking in your home. The optimal indoor ...

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Industry leaders realized hundreds of years ago that their processes and machines operate best when the indoor relative humidity is maintained at an optimum level for their process. They found it was ...

Sally has heard that indoor humidity can be extremely low in the winter and wonders how that happens. The humidity measure with which most of us are familiar is relative humidity. That is expressed as ...