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excerpted from
The New Independent Home
by Michael Potts
from chapter 5 :
Degree Day Heating and Cooling Regimes |
Degree-days of heating (left) and cooling (right) for cities in the United States, using optimal figures of 68 degrees Fahrenheit (° F) for heating and 72°F for cooling. Numerals are rankings of 100 cities, based on the energy required, using the CNG Energy Index, a more sensitive measure of actual energy requirements. The CNG Energy Index considers temperature, insolation, humidity, and the previous day's weather in order to predict the amount of energy required to keep space livable. Oakland, California ranks number one, Phoenix, Arizona is number 100.
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