Beatrice Lang
Heating and cooling systems are the biggest users of electricity in most homes, accounting for up to 52% of energy usage. This is followed by water heaters, which can account for almost 14% of electricity usage. Lighting is the third-highest use of electricity in a home, making up about 9% of a typical home's energy use. Other big users of electricity in the home include refrigerators, TVs, cable boxes, and cooking appliances.
| Characteristics | Values |
|---|---|
| Heating and cooling systems | 52% of energy usage |
| Water heaters | 14% of household electricity usage |
| Lighting | 9% of energy usage |
| Refrigerators | 7% of electricity consumption |
| Separate freezers | 1.6% of electricity consumption |
| Cooking | 3% of monthly electricity usage |
| Dishwasher | 2% of monthly electricity usage |
| TV and cable boxes | 2% of monthly electricity usage |
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What You'll Learn
Heating and cooling systems
Heating systems work by burning fuel, commonly natural gas or propane, in a combustion chamber, producing hot air that is distributed through ducts and vents to different rooms in the home. There are several types of heating systems, including furnaces, heat pumps, boilers, and radiant heating. Furnaces are one of the most common heating systems, with natural gas or propane heat being favoured in the Midwest. Heat pumps are another option, with geothermal heat pumps being the most affordable, followed by air heat pumps and ductless systems. Electric baseboard heaters are zonal heaters that are controlled by a built-in thermostat and tend to be the least expensive and easiest to install. They only need to be wired up and fastened to the wall. Hydronic baseboard systems use water or oil instead of electric resistance and tend to be more expensive. Electric resistance heating is 100% energy efficient since all the electricity is converted to heat, but it can be expensive to operate during extended cold weather.
Radiant heating is an innovative heating system that delivers warmth by directly heating floors, walls, or ceilings. Hydronic radiant heating circulates hot water through tubes installed in the floor, providing consistent heat. Electric radiant heating uses heating cables or mats installed under the floor or in walls/ceilings to generate heat, making it a good retrofit option for existing homes. Thermostats play a crucial role in heating systems by allowing users to set desired temperatures and control the heating system's operation. Smart thermostats offer advanced energy-saving capabilities, and programmable thermostats allow for scheduling temperature adjustments based on daily routines, helping to save energy when the house is empty.
Cooling systems, such as air conditioners, also contribute significantly to electricity usage, especially during hot summer months. Central air conditioners use a lot of energy to maintain the desired temperature in a home. While specific details on how cooling systems work were not found in the search results, it is clear that they play a significant role in household electricity consumption.
To reduce electricity costs associated with heating and cooling, several strategies can be employed. Proper insulation and sealing of the home can help retain warm air during winter and cool air during summer, reducing energy waste. Energy-efficient windows can prevent heat loss in winter and maintain comfortable indoor temperatures. Regular maintenance of heating and cooling systems, including cleaning filters and checking for issues, improves efficiency and prolongs equipment lifespan. Weatherstripping and sealing can prevent drafts and keep warm air inside during winter. Additionally, smart home technology allows for remote control of heating systems, ensuring energy isn't wasted on heating an empty house.
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Water heaters
The amount of energy used by a water heater depends on its capacity in litres and its energy efficiency rating. The average water heater runs at around 1125 watts, though some more powerful heaters can use up to 4000 watts. The average hot water heater consumes around 5,000 watts of electricity, with some using as many as 11,000 watts. The consumption of electric water heaters varies between 400 and 3000 kWh per year.
There are ways to reduce the amount of energy used by a water heater. Installing a low-flow showerhead can reduce the cost of your utility bill and the amount of hot water needed for showering. Insulating your water heater can also improve its efficiency. Installing a programmable thermostat can also help to regulate the temperature of your water heater, reducing wastage and saving money on energy bills.
Compared to gas heaters, electric heaters tend to be 2-3 times more expensive to operate. However, electric heaters are more ecological than gas or butane heaters.
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Lighting
To reduce electricity usage from lighting, you can opt for more energy-efficient light bulbs. The top lighting technology on the market, LEDs, use significantly less energy than their predecessors (CFLs and incandescent bulbs) and also last much longer, which reduces waste.
In addition to lighting, other major electricity consumers in the average household include heating and cooling appliances, electric water heaters, electric ovens, and electronic entertainment devices such as televisions, cable boxes, and video game consoles. The monthly energy usage of appliances like washers and dryers depends on how often they are used. However, running the washer with hot water and using the dryer can increase electricity consumption.
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Refrigerators
The amount of energy consumed by a refrigerator depends on various factors, such as size, frequency of use, age, and location. Larger refrigerators may consume more energy than smaller ones, and refrigerators that are used more frequently will consume more energy as they require a lot of energy to bring the temperature back down after opening the door. Older models may use more electricity than newer, more energy-efficient models, and the warmer it is outside, the more energy is needed to keep the refrigerator cool.
The average refrigerator consumes about 500 kWh of electricity annually, which can cost about $95 per year, depending on the electricity plan and region. Newer, more energy-efficient refrigerators can use about 50% less energy than refrigerators manufactured 20 years ago. Energy efficiency is paramount in managing a refrigerator's energy consumption, and understanding the advantages of an energy-efficient refrigerator can help inform purchase decisions.
To reduce a refrigerator's power consumption, proper maintenance and habits for energy savings can be implemented. This includes keeping the refrigerator door closed as much as possible, organizing the interior for easy access, and defrosting regularly. For mini-fridges, proper placement away from heat sources, regular maintenance such as cleaning coils and checking door seals, and keeping the door closed can also improve energy efficiency.
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Entertainment electronics
TVs and computers alone make up almost 6% of residential energy usage, according to the Strada Services website. This is due in part to the fact that they draw a small amount of power even when they are not actively in use. Computers and computing equipment use 1.1% of the energy consumed at home, and smart plugs can be used to reduce this consumption by shutting off the power completely at night and tracking energy data.
To reduce the energy consumption of entertainment electronics, there are several strategies you can implement. Firstly, consider turning off items when not in use. Power strips with on/off switches can make this easier, especially for entertainment centers with multiple devices. Secondly, install smart outlets that can automatically cut the power supply to devices that fall below a certain threshold. Thirdly, turn off standby modes on devices like printers and TVs, and instead turn them on manually when needed. Finally, use sleep timers to avoid having devices running continuously throughout the night.
While entertainment electronics can contribute significantly to household electricity usage, heating and cooling systems, water heaters, and lighting are typically the largest consumers of electricity in homes.
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Frequently asked questions
Heating and cooling systems are the biggest culprits of residential electricity consumption. In fact, heating alone can account for 25% of your annual electricity usage.
Water heaters are the second biggest energy consumption device in the home. They run for about 3-5 hours a day and are used for showers, washing machines, sinks and dishwashers.
Lighting is the third highest electricity usage in your home. You can reduce your energy usage by switching off lights when they're not in use and replacing traditional bulbs with LED lights.
Try to buy energy-efficient appliances, like Energy Star-rated devices. You can also invest in smart appliances, which will monitor your electricity usage and turn off automatically when you're not using them.
Try to run appliances like your dishwasher and washing machine during periods of low electricity demand, usually in the middle of the night or during the day.
