Dry Winter Air in Home

When repairing or installing new furnaces, I'm often asked about dry air in the winter. Many people associate dry air with running the furnace or heat pump. Neither type of heating system removes moisture from the air. The air is simply heated as it passes through the equipment. There is no change in moisture content. The dry air in the home is caused by infiltration (Wiki Definition) of outside winter air. During the winter months, [...]