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Closeup of inside a home natural gas furnace showing blue jets of fossil fuel burning.

Stock Photo:
Image ID: 610843
Small
500x323 6.9"x4.5" (72dpi) 185 KB
Med
1000x646 3.3"x2.2" (300dpi) 552 KB
Large
4312x2784 14.4"x9.3" (300dpi) 5.3 MB
Super
8624x5568 28.7"x18.6" (300dpi) approx.14.2 MB
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