Why Does My Furnace Have Rust in It? - Bell Plumbing &
Rust is the result of oxidation that occurs when metal, oxygen, and water mix. The great danger of rust to metal is that it eats away at the metal and eventually causes it to crumble and flake away. You don't want this to occur to your furnace, especially along the heat exchangers: if cracks occur in a heat exchanger because of the weakening ...
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