In an average Irish household, numerous appliances are in operation on a daily basis. However, have you ever wondered which appliances consume the most electricity and which ones are more economical? Let's delve into this topic.
To understand electricity consumption, we measure it in kilowatt hours (kWh). A kilowatt (kW) comprises 1,000 watts, so when an appliance with a power rating of 1 kW runs for an hour, it consumes 1 kWh of energy.
Now, let's explore which appliances tend to be more expensive to run and how we can minimise our consumption and subsequent bills.
One of the initial steps is understanding which appliances utilise the most electricity. Another crucial factor is employing smart practices regarding the timing and frequency of appliance usage.
When purchasing an appliance, its manual usually provides information about its energy consumption. It is advisable to keep this information rather than discarding it.
In general, the higher the power rating in kW, the more energy an appliance consumes. For instance, a 3 kW appliance consumes three times as much energy as a 1 kW device per hour of usage, and five times as much energy as a 600-watt (0.6 kW) device.
However, some appliances like washing machines, dishwashers, refrigerators, and computers only operate at their maximum power rating for short durations, making it challenging to calculate their precise energy consumption and associated costs.
Nonetheless, a useful rule of thumb is that appliances which generate heat quickly tend to be more expensive to operate. Consider items such as kettles, hair dryers, tumble dryers, and electric showers – they have a significant appetite for electricity.
Let's now examine the potential costs of operating a few appliances throughout the day.
Note: The actual cost will depend on the energy efficiency of the specific appliance, its size, and the unit rate for electricity. For example, a G-rated 65" TV will consume more energy compared to a C-rated 42" TV.
Most modern appliances, especially washing machines, tumble dryers, dishwashers, and TVs, are far more efficient than older models. However, energy efficiency ratings (ranging from A to G) are still valuable when choosing an appliance. A-rated appliances are the most energy-efficient.
Furthermore, if you have a night saver meter or a new smart meter installed, you may have the opportunity to benefit from cheaper electricity rates by adjusting your energy usage to off-peak hours.
|Appliance/Activity||Energy Of Appliance||Cost inc. VAT @ 9%*||Based on Usage Of|
|Immersion||3 kW||€2.58||2 Hours to fully heat 120-litre tank from cold|
|Tumble dryer||3 kW||€1.25||1 Hour of drying|
|Cooking (Oven/Electric)||2.5 kW||€1.05||1 Hour of cooking|
|Dishwasher (D Rated)||1.5 kW per cycle||€0.65||Standard 65º cycle|
|Iron||2.5 kW||€1.02||Hour of Ironing|
|Desktop Computer||0.2 kW||€0.40||8 Hours of use|
|Washing Machine (D Rated)||1 kW per cycle||€0.45||Standard 40º Wash|
|Fridge/Freezer||0.18 kW/350 kWh annual||€0.41||24 Hours running|
|Electric Shower||9.5 kW||€0.68||10 Mins shower|
|Laptop||0.1 kW||€0.20||8 Hours of use|
|Kettle||2.5 kW||€0.18||10 Mins of boiling|
|TV (55" D rated)||100 kW per 1,000 hours||€0.12 4||Hours of use|
|Lightbulb 60 Watt||0.06 kW||€0.15||6 Hours of light|
|Hair Dryer||2 kW||€0.30||20 Mins of use|
|Vacuum Cleaner||0.7 kW||€0.15||30 Mins of usage|
|Router||0.01 kW||€0.08||One Day’s usage|
|Microwave||0.8 kW||€0.09||15 Mins of use|
|Toaster||1.5 kW||€0.10||10 Mins of use|