Friday, October 15, 2010

Written December 22, 2008 for City-Data: The 3:1 Principle

I have two properties in Glendale, a suburb of Cincinnati. Live in one and have been trying to sell the other. 885 Greenville, [sold June 2009] an old insulated Victorian, where we used to live, heats about 3200 sq ft with three newish furnaces. When in full use on a normal winter I used 280 cu ft/month for the five winter months.  In our present home, a brick ranch two blocks away, we use about the same although the sq footage heated is about 2800. [much lower average use now -- maybe 200 cu ft/month -- after more insulation and more spot heating]

I have a blog which really goes into this topic of average usage during the winter months,

What is neat and simple, is that my ratios for both houses are as follows [when the cost was an even $1 per ccf; it'll be $.75, or even $.65 per ccf this winter of 2010-11]:

Go outdoors. If the avg. temp for the day is, like today, [December 22, 2008], 10, then I subtract 10 from 65 degrees, getting 55 "heating degree-days," a recognized term by the experts. Then I simply divide by 3 to get my cost per day per house. So today my cost for each house is $18 per house. [at 2010 prices this would be $13.50 per house] Wow. Sorry I went into this.

Will be cold again tonight but warming thereafter into the 50's.

Click on "heating degree days" and "ebills" in for more than you want to know about this topic. Also my very early posts on the blog give the normal heating degree days by day for all the winter months, to be used for projecting the upcoming winter months. This used to be readily-available at the Weather Service but it is not now without paying [a small sum] for it. But it is a stable chart for Cincinnati, so it's valuable until they run another 30-year period.

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