Yes, it is entirely normal for a brand-new residential furnace to produce a noticeable smell during its initial days of operation. When manufacturers build a heating unit, various protective oils, lubricants, and chemical coatings are applied to metal components like the heat exchanger and burners to prevent corrosion during shipping and storage. When you turn on the brand-new furnace for the first time, these manufacturing residues bake off rapidly under high operating temperatures, producing a distinct metallic, oily, or chemical odor. This temporary scent usually clears up within a few hours to a couple of days of regular heating use, especially if you cross-ventilate your home by opening windows. However, if the smell is acrid, smells like melting plastic, or does not dissipate after several days, professional inspection is recommended. You can verify normal operation when the burn-off odor stops.
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