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Energy Consumption of Major Household Appliances Shipped in Canada – Trends for 1990-2003


3  Dishwashers

3.1   2003 Market Snapshot

The shipment-weighted average annual unit energy consumption of dishwashers in 2003 was 524 kilowatt hours (kWh). Nearly 49 percent of the standard models on the market that year – that is, those with an exterior width of more than 56 centimetres – qualified as ENERGY STAR® products, exceeding the federal minimum energy performance standards (MEPS) in Canada’s Energy Efficiency Regulations by at least 25 percent.

3.2  Distribution of Shipments

3.2.1  Distribution by Average Annual Unit Energy Consumption

In 1990, dishwashers consuming more than 700 kWh annually represented 99.8 percent of the market. The majority (68.7 percent) of these dishwashers consumed at least 1000 kWh.

By 2003, nearly all dishwashers consumed less than 700 kWh annually, with 79.2 percent consuming less than 600 kWh.

FIGURE 3.1
Energy Consumption of Dishwasher Models Available in 2003

Energy Consumption of Dishwasher Models Available in 2003.

TABLE 3.1
Distribution of Dishwashers by Average Annual Unit Energy Consumption
Model
Year
kWh/yr.
350-399.9 400-499.9 500-599.9 600-699.9 >700
  (%) (%) (%) (%) (%)
1990 0.0 0.0 0.0 0.2 99.8
1991 0.0 0.0 0.0 5.8 94.2
1992 0.0 0.0 0.0 8.5 91.5
1993 0.0 0.0 0.4 7.7 91.9
1994 0.0 0.5 0.5 32.9 66.1
1995 0.2 0.9 0.9 63.7 34.2
1996 0.2 0.9 3.9 63.0 32.0
1997 0.4 1.1 20.5 56.9 21.2
1998 0.2 1.2 23.4 71.6 3.7
1999 0.2 1.4 24.9 73.6 0.0
2000 0.1 3.9 19.3 76.7 0.0
2001 0.0 5.5 23.9 70.6 0.0
2002 3.2 13.6 37.8 45.5 0.0
2003 9.1 33.6 36.5 20.7 0.0
Average
Annual
Change
+0.7% +2.6% +2.8% +1.6% -7.7%

FIGURE 3.2
Distribution of Dishwashers by Average Annual Unit Energy Consumption for 1990

Distribution of Dishwashers by Average Annual Unit Energy Consumption for 1990.

FIGURE 3.2
Distribution of Dishwashers by Average Annual Unit Energy Consumption for 2003

Distribution of Dishwashers by Average Annual Unit Energy Consumption for 2003.

3.3  Energy Consumption

3.3.1  Average Annual Unit Energy Consumption by Model Year

Between 1990 and 2003, the energy performance of dishwashers improved remarkably. As Figure 3.3 shows, the average annual unit energy consumption decreased by about 49 percent, or 502 kWh, during the period. Most of the improvement occurred before 1995, when the average annual unit energy consumption decreased from 1026 to 671 kWh or by 35 percent. From 1995 to 2003, the decrease in the average annual unit energy consumption tapered off to 523.9 kWh, a difference of 147 kWh, or 22 percent, from the 1995 level.

FIGURE 3.3
Average Annual Unit Energy Consumption of Dishwashers by Model Year*

Average Annual Unit Energy Consumption of Dishwashers by Model Year.

* For greater detail, see Table C.7.

3.4   Energy Savings

It is estimated that annual energy consumption for dishwashers was significantly less between 1993 and 2003 than it would have been without the 1995 MEPS and a general improvement in energy efficiency.

The average annual energy savings for dishwashers were estimated to be 0.37 petajoules (PJ) during 1993 to 2003. (No savings were expected for 1992.) This indicates that, on average, dishwashers consumed about 0.37 PJ less annually than they would have without the MEPS and improved energy efficiency. The largest annual energy savings occurred in 2003, when dishwashers consumed 0.77 PJ less than they otherwise might have.

FIGURE 3.4
Annual Energy Savings for Dishwashers, 1992–2003*

Annual Energy Savings for Dishwashers, 1992–2003.

* For greater detail, see Table C.8.

FIGURE 3.5
Cumulative Energy Savings for Dishwashers, 1992–2003*

Cumulative Energy Savings for Dishwashers, 1992–2003.

* For greater detail, see Table C.8.

The cumulative energy savings for dishwashers are shown in Figure 3.5. Since annual energy savings accrue over time, cumulative energy savings grew steadily between 1992 and 2003. Cumulative energy savings reached a total of 4.08 PJ in 2003.

To summarize, the energy efficiency of dishwashers improved steadily between 1990 and 2003 – by 2003, 99.9 percent of all dishwashers consumed less than 700 kWh per year; whereas in 1990, almost all dishwashers (99.8 percent) consumed more than 700 kWh per year. The average annual energy savings for dishwashers were estimated to be 0.37 PJ between 1993 and 2003, with total energy savings for that period reaching 4.08 PJ.