question in Building Construction Illustrated

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    Ryan Gallegos

    I will say, the higher the temperature of the surfaces in the space require the air temperature to be cooler to have an overall comfortable space. Balancing the MRT with the air temperature.

    MRT = Mean Radiant Temperature.

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    Rebekka O'Melia

    So the MRT = mean radiant temperature.  If air conditioning hasn't been used and the outside air is 90°, eventually the building and everything inside it will be 90°.  All the furnishings (desks, chairs, books, floorings, EVERYTHING) inside the building will be 90°.  Once everything has heated up to that extent, the furnishings are radiating heat into the space as you are trying to cool the air.  It takes a long time for the a/c to cool it down 70° let's say.  So it makes sense to say that setting the a/c to 60° would cool the furnishings (and the air) faster than setting it 70°. 

    Hope that helps. 

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    Yanrong Gao

    Hi Ryan,

    Thanks for your answers.

    Hi Rebekka,

    I cannot understand what's the example's meaning and relationship with my question. Sorry!

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