Why Is Moisture a Concern with Furnaces?
Moisture in contact with metal can lead to corrosion, and corrosion in turn weakens metal, eventually causing it to crumble away to nothing. When it comes to metal appliances in your home, corrosion is one of the #1 enemies. But how does this apply to a furnace? Unlike a boiler, which circulates water as part of its operation, a furnace does not use water to work. It seems strange that a furnace might rust because of moisture, unless there was a flood in the basement where the furnace cabinet is located.
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