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  2. Merrimack Valley gas explosions - Wikipedia

    en.wikipedia.org/wiki/Merrimack_Valley_gas...

    Restoration of gas service to the 8,600 affected customers required the replacement of about 48 miles (77 km) of gas pipeline, which Columbia Gas expected to accomplish by November 19, 2018. [ 30 ] [ 31 ] On September 22, 2018, National Guard troops began delivering about 7,000 hot plates to customers to temporarily replace gas stoves for ...

  3. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    This limit controller may shut the furnace off if the blower fails or if something is blocking the air flow. The heated air is then sent back through the home through supply ducts. In larger commercial applications, central heating is provided through an air handler which incorporates similar components as a furnace but on a larger scale.

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic to switch dampers became standardized. Eventually, the relays became electronic switches, as transistors eventually could handle greater current loads. By 1985, pneumatic controls could no longer compete with this new technology ...

  5. 39 students, staff, EMS workers hospitalized after furnace ...

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  6. Vale (VALE) Q4 2024 Earnings Call Transcript - AOL

    www.aol.com/finance/vale-vale-q4-2024-earnings...

    Now, I will turn the conference over to Mr. Gustavo Pimenta. Sir, you may now begin. Gustavo ... really good job to be able to set ourselves up for the second furnace, also improve our products ...

  7. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    At the furnace, cool air passes into the furnace, usually through an air filter, through the blower, then through the heat exchanger of the furnace, whence it is blown throughout the building. One major advantage of this type of system is that it also enables easy installation of central air conditioning , simply by adding a cooling coil at the ...

  8. Vietnam’s ‘blazing furnace’ sees real estate mogul sentenced ...

    www.aol.com/finance/vietnam-blazing-furnace-sees...

    The fraud is equivalent to 3% of the country's GDP. Vietnam’s ‘blazing furnace’ sees real estate mogul sentenced to death for $12 billion fraud.

  9. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    Heat is produced via combustion of fuel. A heat exchanger keeps the combustion byproducts from entering the air stream. A ribbon style (long with holes), inshot (torch-like), or oil type burner is located in the heat exchanger.

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