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Conductive Heat Loss

  1. Sep 25, 2013 #1

    TPU

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    1. The problem statement, all variables and given/known data

    If only conductive heat loss was significant for a house, then by what percentage would you lower the heat loss if the temperature was reduced inside from 70°F to 68°F, when the outside temperature is 26°F? (Hint: Try using a ratio.)

    2. Relevant equations

    N/A, use a ratio

    3. The attempt at a solution

    This question was given with no explanation and no examples are present anywhere. I don't know what kind of equation to use since no area or R values are given. I did 70-26 and 68-26 then found the percentage between them which came out to 4.55%. Is this correct?
     
  2. jcsd
  3. Sep 25, 2013 #2

    haruspex

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    Yes.
    The conduction of heat through a wall is proportional to the temperature difference across it (70-26 versus 68-26).
     
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