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### Example 1

**Given the following set of average temperatures, by month, for State College, PA, calculate the HDD for the heating season:**

Jan. | Feb. | Mar. | Apr. | May | Jun. | Jul. | Aug. | Sep. | Oct. | Nov. | Dec. |
---|---|---|---|---|---|---|---|---|---|---|---|

25°F | 28°F | 37°F | 48°F | 59°F | 67°F | 71°F | 70°F | 62°F | 51°F | 41°F | 31°F |

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### Example 2

**If Ms. S. Belle moves from Birmingham, AL (HDD=2,800) to State College, PA (HDD=6,000) how much can she expect her heating bill to increase? **

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