• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • How Much Does a Degree (F) Cost?

    October 29th, 2011
    heating, money, temperature  [html]

    Update 2019-07-19: there are several errors in the post below. A better calculation is at the end of my rough utility costs post.

    Growing up, my parents always kept the thermostat set low to save money. Now that I'm living elsewhere, it would be nice to know how much it costs us to set the thermostat at 68F instead of 62F. What is the marginal cost of a degree (F)?

    We live on the third floor of a triple decker apartment building. When we visited the apartment in February, before moving in, the apartment was empty and the heat was turned off. It was about 50F then, heated from the landlord's apartment below, so I'll use 50F as the temperature this apartment would be naturally in February.

    Our gas bills over the time we've lived here have been:

    Month   Cost
    March $116
    April $41
    May $22
    June $27
    July $23
    August $22
    September $25

    Our gas bill represents both heat and hot water. It looks like in months where we don't use the heat at all, we spend about $25 on hot water, so our March cost for heat was probably about $90. We had the thermostat set to 64 (58 at night and during the day when no one was home) for an average of about 60. Very roughly, then, it cost us $10/degree per month.

    To get more accurate than that, we should take into account that each additional degree is more expensive than the last, because the rate of heat loss is proportional to how much warmer than the surroundings you are. There's also the heat that the four adults, one baby, and two cats produce, but that's probably pretty small. Heat from cooking might be significant, but mostly that makes the kitchen warm and doesn't affect the room with the thermostat.

    Update 2011-11-21: "the rate of heat loss is proportional to how much warmer than the surroundings you are" does not give "each additional degree is more expensive than the last". Instead it gives "each additional degree is just as expensive than the last".

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    How to extend pockets

    Make women's pants pockets big enough to hold a phone properly The post How to extend pockets appeared first on Otherwise.

    via Otherwise May 19, 2022

    Buckingham Palace

    I love England. Especially because of the big castle called Buckingham Palace. I got to see the outside there, but my mom showed me some pictures of the inside. I love it there. But the outside doesn't look very fancy to me. But I never knew why those …

    via Anna Wise's Blog Posts April 25, 2022

    What is causality to an evidential decision theorist?

    (Subsumed by: Timeless Decision Theory, EDT=CDT) People sometimes object to evidential decision theory by saying: “It seems like the distinction between correlation and causation is really important to making good decisions in practice. So how can a theor…

    via The sideways view April 17, 2022

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact