Umair Gaines
Many household items pull a lot of electricity, and it's important to be aware of them to save money and the environment. Heating, ventilation, and air conditioning systems use the most electricity, accounting for over 30% of residential energy usage. Other items that use a lot of electricity include refrigerators and freezers, TVs, computers, washing machines, and lighting. These items are always on standby, waiting to be used, or constantly running, which increases their electricity consumption.
| Characteristics | Values |
|---|---|
| Heating, ventilation and air conditioning systems | 30% of residential energy usage |
| Refrigerators and freezers | 6.9% of residential electricity |
| Lighting | 9% of a typical home's energy use |
| TVs, computers, and other electronic entertainment | 6% of residential usage |
| Water heaters | Varies depending on settings and usage |
| Dishwashers | Varies depending on settings and usage |
| Washing machines and dryers | Varies depending on settings and usage |
| Microwaves | Varies depending on usage |
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What You'll Learn
Heating and cooling systems
There are several types of heating and cooling systems, each with its own advantages and disadvantages in terms of electricity usage. For example, gas heaters can be expensive to operate due to significant gas consumption and the additional electricity required for fans and other electrical components. They also lose heat through the flue or open windows, which can further reduce their efficiency. On the other hand, hydronic radiant systems have lower running costs when powered by solar or electric heat pumps, and they operate silently without distributing dust particles.
Ducted gas heating can be an effective option as it allows you to zone heating to specific rooms, but it also has high purchase, installation, and running costs. Portable evaporative coolers are less effective at cooling a room, especially in low humidity environments, as they constantly recirculate indoor air and add humidity, which can eventually lead to warming the room. In contrast, fans are a low-cost option for cooling, but they must be blowing directly on you to feel the effect, and they cannot cool an entire room.
To reduce energy consumption and costs associated with heating and cooling systems, several innovative solutions have been proposed. Smart electrification, for instance, uses predictive and adaptive algorithms to adjust heating, ventilation, and cooling based on real-time power market conditions and consumer needs, ensuring comfort at lower prices. Additionally, thermal storage solutions, such as ice-based energy storage with solar PV-powered refrigeration, can significantly reduce energy consumption in cooling-as-a-service models.
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Refrigerators and freezers
The average refrigerator can use about $100 worth of electricity per year, depending on the model, the TDU region, and the energy efficiency of the appliance. The cost of running a refrigerator can be a significant portion of your monthly electricity bill.
The energy consumption of a refrigerator is influenced by several factors. Firstly, older models tend to use more electricity than newer, more energy-efficient ones. Secondly, the temperature outside the refrigerator impacts its electricity usage. Warmer environments require more energy to keep the fridge and its contents cool. Additionally, larger refrigerators that are frequently opened and located in hot regions will use more electricity.
To enhance energy efficiency, it is recommended to keep frequently used items at the front of the fridge to avoid leaving the door open for extended periods. Regular cleaning of the back and underside of the fridge is also important to ensure proper airflow.
When considering a new refrigerator, the ENERGY STAR certification is crucial. ENERGY STAR-certified refrigerators use 70% less energy than those from the 1970s, and they can significantly reduce greenhouse gas emissions and utility costs.
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Lighting
Incandescent light bulbs are far less energy-efficient than modern LED lights, which use about one-tenth of the energy of their older counterparts. For example, a 60-watt incandescent bulb uses 0.06 kWh if left on for an hour, meaning that leaving it on for eight hours would use 0.48 kWh in a night, or 14.4 kWh in a month. This would cost $2.88 per month if the rate is $0.20/kWh. In contrast, a typical LED bulb is 8 watts, and running one for a month would use far less electricity than an incandescent bulb.
While lighting does contribute to electricity usage, it is unlikely that a single light bulb will represent a huge amount of energy use. However, when combined with other appliances, the usage can add up. For example, TVs and computers make up almost 6% of residential energy usage, and ovens and stoves can increase energy usage by straining air conditioning systems.
To reduce energy consumption and costs, it is recommended to use energy-efficient appliances and lighting, and to be mindful of how many appliances are being used at the same time.
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TVs and computers
TVs
The amount of electricity a TV uses depends on various factors, such as its model, size, and special features. Bigger TVs tend to consume more energy than smaller ones, and modern TVs with features like satellite television, Wi-Fi connectivity, and DVR options can continue to use energy even when they appear to be turned off. The average TV uses around 620,000 watt-hours annually, but this can vary significantly.
Some ways to reduce energy consumption by TVs include opting for smaller TVs that fit your needs and choosing energy-efficient models. Additionally, using the TV's sleep timer can help ensure it automatically switches off if you fall asleep, reducing unnecessary energy usage.
Computers
Computers, especially gaming PCs, can consume a significant amount of electricity, depending on their usage and specifications. On average, computers use about 50 watts of electricity to stay powered, but this can vary. For example, a gaming PC might use 300-400 watts while playing games, 200 watts while surfing the web, and 20 watts in standby mode.
To reduce energy consumption by computers, consider using laptops, which consume significantly less energy than desktop computers. Additionally, managing your computer usage, especially during peak hours, can help reduce electricity costs.
While TVs and computers can contribute to overall electricity usage, other appliances like air conditioners, washing machines, and ovens tend to be more power-hungry.
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Washing machines and dryers
Although you may only use your washing machine once every few days, it can still use a significant amount of electricity. On average, washing machines use between 400 and 1,400 watts of electricity, depending on the model. Using a washing machine three times a week will use about 140.4 kilowatt-hours of electricity per year. It costs an average of $1.66 to run a washing machine for a month and $19.92 to run for a year.
If you're looking to save on electricity, installing solar panels is a great option. On average, solar panels are rated at around 350 watts, meaning you'll need about 2-4 panels to power most washing machines.
Now, let's talk about dryers. Dryers use more electricity than washing machines, and they are known for their high energy consumption. On average, dryers use 1,500 to 5,000 watts of electricity, depending on the model. Using a dryer three times a week will use about 468 kilowatt-hours of electricity per year. The cost to run a dryer is higher than a washing machine, averaging $5.53 per month and $66.41 per year.
Electric dryers typically have a higher wattage range than washing machines, from 2,000 to 6,000 watts, translating to about 2 to 6 kilowatt-hours of electricity. Based on the national average rate of 12 cents per kilowatt-hour, each hour of electric drying will cost between 24 and 72 cents, depending on the model.
Similar to washing machines, solar panels can help offset the electricity costs of running a dryer. For a dryer rated at 3,000 watts, you'll need around 8-9 solar panels to power it.
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Frequently asked questions
Heating, ventilation, and air conditioning systems use the most electricity, accounting for about 30% of residential energy usage.
Lighting uses a significant amount of electricity, especially if the lights are on most of the day. Lighting accounts for about 9% of a typical home's energy use.
Light bulbs' energy use varies based on bulb type and usage. A 100-watt incandescent bulb left on for two hours a day uses about 0.2 kWh a day, or 6 kWh per month. Consider using energy-efficient light bulbs.
Refrigerators and freezers are high on the list of appliances that use the most electricity. They need to run constantly, so their usage adds up. Other items include televisions, computers, washing machines, and dishwashers.
