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  • warm air

    From Rich D@21:1/5 to All on Wed Nov 18 13:37:40 2020
    A nearby college includes a building, surrounded by an
    outdoor arcade, at street level. At one point, the warm
    internal air is expelled, which is natural, they perform
    continuous circulation. A nice spot, on a cold night!

    However, I wonder, is there any hazard in breathing that air?
    Is it chemically processed somehow, contaminated?

    And, isn't it inefficient? The outgoing air ought to
    pass through a heat exchanger, to warm the incoming air.
    Isn't that wasted energy?

    --
    Rich

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  • From Jasen Betts@21:1/5 to Rich D on Thu Nov 19 05:47:02 2020
    On 2020-11-18, Rich D <[email protected]> wrote:
    A nearby college includes a building, surrounded by an
    outdoor arcade, at street level. At one point, the warm
    internal air is expelled, which is natural, they perform
    continuous circulation. A nice spot, on a cold night!

    However, I wonder, is there any hazard in breathing that air?
    Is it chemically processed somehow, contaminated?

    possibly it has less oxygen that fresh air, possibly stink and virus
    particles?

    Isn't that wasted energy?

    It might be, it depends if their AC is heating or cooling

    --
    Jasen.

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  • From Ralph Mowery@21:1/5 to All on Sun Feb 14 11:27:36 2021
    In article <[email protected]>, [email protected] says...

    A nearby college includes a building, surrounded by an
    outdoor arcade, at street level. At one point, the warm
    internal air is expelled, which is natural, they perform
    continuous circulation. A nice spot, on a cold night!

    However, I wonder, is there any hazard in breathing that air?
    Is it chemically processed somehow, contaminated?

    And, isn't it inefficient? The outgoing air ought to
    pass through a heat exchanger, to warm the incoming air.
    Isn't that wasted energy?



    Usually the air is passed through a heat exchanger so some of the hot
    inside air will heat the cold outside air before it enters the building.

    There is no chemicals involved. You will be exposed to a combination of
    all the air in all the rooms in the building. Could be a good way to
    contract any virus that anyone in the building has.

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