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Investors Fact Book - Exelon Corporation

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23<br />

Supply and Sales Statistics<br />

ComEd – Electric Sales Statistics, Revenue and Customer Detail<br />

2011 2010<br />

Retail Deliveries (a) (in GWhs)<br />

Residential 28,273 29,171<br />

Small Commercial & Industrial 32,281 32,904<br />

Large Commercial & Industrial 27,732 27,717<br />

Public Authorities & Electric Railroads 1,235 1,273<br />

Total Retail Deliveries 89,521 91,065<br />

Electric Revenue (in millions)<br />

Retail Revenues (a)<br />

Residential $3,510 $3,549<br />

Small Commercial & Industrial 1,517 1,639<br />

Large Commercial & Industrial 383 397<br />

Public Authorities & Electric Railroads 50 62<br />

Total Retail Revenues 5,460 5,647<br />

Other Revenues (b) 596 557<br />

Total Electric Revenues $6,056 $6,204<br />

Customers at Year End<br />

2011 2010<br />

Retail Deliveries Customers<br />

Residential 3,448,481 3,438,677<br />

Small Commercial & Industrial 365,824 363,393<br />

Large Commercial & Industrial 2,032 2,005<br />

Public Authorities & Electric Railroads 4,797 5,078<br />

Total Retail Deliveries Customers 3,821,134 3,809,153<br />

Heating and Cooling Degree Days<br />

2011 2010<br />

Heating Degree Days (normal=6,362) 6,134 5,991<br />

Cooling Degree Days (normal=855) 1,036 1,181<br />

Peak System Load<br />

Summer (d)<br />

2011 2010<br />

Highest Peak Load (MW) 23,753 (c) 21,914<br />

Winter (f)<br />

Highest Peak Load (MW) 15,656 16,092<br />

(a) Reflects delivery revenues and volumes from customers purchasing electricity directly from ComEd and customers purchasing electricity from a competitive<br />

electric generation supplier as all customers are assessed delivery charges. For customers purchasing electricity from ComEd, revenue also reflects the cost of energy.<br />

(b) Other revenue primarily includes transmission revenue from PJM Interconnection, LLC (PJM).<br />

(c) Refers to the normal time period of 30 years ending 2006. As of calendar year 2012 ComEd began using a new normal time period: 30 years ending 2010.<br />

The HDD and CDD normals for this period are 6,340 and 842, respectively.<br />

(d) Summer is defined as June 1 to September 30 of the reporting year.<br />

(e) The summer peak load of 23,753 MW that occured on July 20, 2011 is the all-time peak load for ComEd.<br />

(f) Winter is defined as November 1 of the previous year to March 31 of the reporting year.

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