Assumptions to the Annual Energy Outlook 2003

Table 13.  Minimum and Maximum Life Expectancies of Equipment

 

  Equipment

 

                          Minimum  Life

 

                             Maximum  Life

Heat Pumps    

7

21

Central Forced-Air Furnaces

10

25

Hydronic Space Heaters

20

30

Room Air Conditioners

12

19

Central Air Conditioners

8

16

Gas Water Heaters    

4

14

Electric Water Heaters

5

22

Cooking Stoves    

16

21

Clothes Dryers    

11

20

Refrigerators    

7

26

Freezers    

11

31

Source:  Lawrence Berkeley Laboratory, Baseline Data for the Residential Sector and Development of a Residential Forecasting Database, May 1994, and analysis of RECS 1997 data.