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  2. Is It Time for a Furnace Upgrade? 10 Warning Signs to ... - AOL

    www.aol.com/time-furnace-upgrade-10-warning...

    Depending on the problem and the age of the furnace, it may be more cost-effective to invest in a replacement furnace instead of making expensive repairs to an old system. 10. Visible Signs of ...

  3. Magic smoke - Wikipedia

    en.wikipedia.org/wiki/Magic_smoke

    "Magic" smoke being released from an electronic component for demonstration purposes. Magic smoke (also factory smoke, blue smoke, or the genie) is a humorous name for the caustic smoke produced by severe electrical over-stress of electronic circuits or components, causing overheating and an accompanying release of smoke.

  4. Phantosmia - Wikipedia

    en.wikipedia.org/wiki/Phantosmia

    Phantosmia (phantom smell), also called an olfactory hallucination or a phantom odor, [1] is smelling an odor that is not actually there. This is intrinsically suspicious as the formal evaluation and detection of relatively low levels of odour particles is itself a very tricky task in air epistemology.

  5. Polymer fume fever - Wikipedia

    en.wikipedia.org/wiki/Polymer_fume_fever

    When PTFE is heated above 450 °C the pyrolysis products are different and inhalation may cause acute lung injury. [2] Symptoms are flu-like (chills, headaches and fevers) with chest tightness and mild cough.

  6. 1,1,1,2-Tetrafluoroethane - Wikipedia

    en.wikipedia.org/wiki/1,1,1,2-Tetrafluoroethane

    1,1,1,2-Tetrafluoroethane (also known as norflurane (), R-134a, Klea 134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, HFA-134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential and a lower 100-year global warming ...

  7. Arc-fault circuit interrupter - Wikipedia

    en.wikipedia.org/wiki/Arc-fault_circuit_interrupter

    2. A listed branch/feeder-type AFCI that is installed at the origin of the branch circuit working in combination with the listed outlet branch-circuit-type AFCI (OBC AFCI) installed at the first outlet box which must also be marked that it is the first outlet box of the branch circuit. 3.

  8. 'Snowball's chance in hell': Trudeau responds to Donald Trump ...

    www.aol.com/snowballs-chance-hell-trudeau...

    Trump has repeatedly threatened to annex Canada with the latest instance coming Tuesday when he said that he wanted to acquire the U.S.'s northern neighbor with "economic force."

  9. Flue gas - Wikipedia

    en.wikipedia.org/wiki/Flue_gas

    Quite often, the flue gas refers to the combustion exhaust gas produced at power plants.Its composition depends on what is being burned, but it will usually consist of mostly nitrogen (typically more than two-thirds) derived from the combustion of air, carbon dioxide (CO 2), and water vapor as well as excess oxygen (also derived from the combustion air).