Heating and cooling can account for about 40-50% of home electricity use in some estimates. In most homes, they are the biggest users, followed by water heating, refrigeration, and heat-making appliances like tumble dryers, ovens, and dishwashers. This guide ranks them, explains why, and shows how to spot the ones costing you too much.
- Heating and cooling are the largest loads, at about 40-50% of electricity use in some estimates.
- Water heating can make up about 10-15% of home energy use.
- Fridges and freezers run 24/7, so they add up even though they use little power at any moment.
- One watt of constant standby power uses about 9 kWh a year.
- Age and faults both raise running costs. A mid-1980s fridge can use about 1,200 kWh a year, against 350-450 kWh for a new one.
- What Appliances Use the Most Electricity in a House?
- Which Appliances Use the Most Electricity in the UK?
- Why Heat-Making Appliances Use So Much
- Which Appliances Use the Most Electricity on Standby?
- Do Appliances Use More Electricity as They Get Older?
- Can Faulty Appliances Use More Electricity?
- How to Tell If an Appliance Costs Too Much
- Ways to Cut Appliance Electricity Use
- Frequently Asked Questions
What Appliances Use the Most Electricity in a House?
Start with the big picture. Whole-home systems use far more than any single gadget. Heating and cooling come first. Electric water heating comes next, at about 10-15% of a home’s energy use.
Refrigerators, freezers, dishwashers, dryers, and washing machines together can account for about 8-15% of home electricity use. That sounds small, but these are the items you can swap or change habits on most easily.
Which Appliances Use the Most Electricity in the UK?
In UK homes, the heaviest users are the ones that make heat or run non-stop. Electric showers, room heaters, tumble dryers, ovens, and immersion heaters draw the most power while on. Fridges and freezers draw little, but never switch off.
The table below shows rough, typical figures. Actual use depends on the model, your habits, and your tariff.
| Appliance | Typical power draw | How it uses energy |
|---|---|---|
| Electric shower | About 7-10 kW | Very high, but only while running |
| Portable electric heater | About 1-3 kW | High, and often left on for hours |
| Immersion heater | About 3 kW | High when heating the tank |
| Tumble dryer | About 2-3 kW | High for every cycle |
| Electric oven | About 2-3 kW | High, but it cycles on and off |
| Dishwasher and washing machine | Peaks at about 2 kW | Most energy goes to heating water |
| Fridge-freezer | Low, but runs 24/7 | Steady load all year |
Treat these as ballpark values. Check the rating plate on your own appliance. Which appliances use more electricity? The ones with high wattage and long run times. Both matter.
Why Heat-Making Appliances Use So Much
Appliances with moving parts or that produce heat generally use far more electricity than those that mainly make light or sound. Heating air, water, or food takes a lot of energy. A kettle, a shower, and a dryer all do the same job: turn electricity into heat fast.
That is why a laptop or LED bulb barely moves your bill, while a dryer can. Domestic appliances that use the most electricity are almost always heat-makers.
Which Appliances Use the Most Electricity on Standby?
Standby power is small per device, but constant. One watt running all year uses about 9 kWh. Devices with external power supplies, internal batteries, remote controls, LED displays, or constant network connections commonly draw it.
Common offenders include:
- TVs and set-top boxes
- Games consoles
- Broadband routers
- Soundbars and speakers
- Phone and tool chargers left plugged in
- Microwaves and ovens with clock displays
At an example rate of 25p per kWh, 1 W of standby costs about £2.25 a year. Ten such devices cost about £22. It is not huge, but it is money for nothing. The Berkeley Lab standby power site explains the research behind these figures.
Do Appliances Use More Electricity as They Get Older?
Often, yes. Older models were built to weaker efficiency standards. One example cites about 1,200 kWh a year for a mid-1980s refrigerator, against 350-450 kWh for a comparable new one.
Here is a worked example using an assumed 25p per kWh:
- Old fridge: 1,200 kWh × 25p = about £300 a year
- New fridge (400 kWh, mid-range): 400 kWh × 25p = about £100 a year
- Saving: about £200 a year
Over five years, that gap could cover much of the cost of a new unit. For more examples, see this HomeServe guide to old appliance energy use.
Can Faulty Appliances Use More Electricity?
Yes, a fault can raise running costs. Worn parts make a machine work harder or run longer. Common signs include:
- A fridge with a worn door seal that runs almost constantly
- Heavy frost build-up in a freezer
- A dryer with a blocked vent or full filter, so cycles take longer
- An oven door that does not seal, so heat escapes
- A machine that feels hot, hums loudly, or never seems to stop
- Fridge runs nonstop and feels warm outside: check the door seal and clean the coils.
- Dryer cycles take longer than before: clean the filter and check the vent.
- Repair costs more than half the price of a new model, and it is over 10 years old: consider replacing it.
How to Tell If an Appliance Costs Too Much
You do not need to guess. Use this checklist:
- Find the wattage on the rating plate or in the manual.
- Multiply kW by hours used to get kWh. A 2 kW dryer running 1 hour uses 2 kWh.
- Multiply by your unit rate, shown on your bill.
- Use a plug-in energy monitor for appliances you can plug in. The Centre for Sustainable Energy explains how to measure your use.
- Check standby by looking for lights, displays, and warm power bricks.
Ways to Cut Appliance Electricity Use
- Wash at lower temperatures and run full loads.
- Dry clothes on a line or airer when you can.
- Shorten shower time. It is the quickest saving with an electric shower.
- Use smart plugs or a switch strip for TVs and consoles.
- Replace very old fridges and freezers first, because they run all day.
- Keep fridge coils, filters, and seals clean.
Frequently Asked Questions
What appliances use most electricity?
Heating and cooling use the most, followed by water heating. Among single appliances, tumble dryers, electric showers, ovens, and room heaters draw the most power when on.
What appliances use most electricity in house?
Heating and cooling can make up about 40-50% of home electricity use. Water heating adds about 10-15%. Fridges, freezers, dishwashers, dryers, and washing machines together add about 8-15%.
What appliances use most electricity UK?
In UK homes, look first at electric showers, portable heaters, immersion heaters, tumble dryers, and ovens. Fridges and freezers add a steady load all year.
Which appliances use most electricity on standby?
TVs, set-top boxes, consoles, routers, soundbars, and chargers are common. Devices with displays, remotes, or network connections tend to draw the most.
Can faulty appliances use more electricity?
Yes. Worn seals, blocked vents, and failing parts make machines run longer or work harder, which raises kWh use and cost.
Do appliances use more electricity as they get older?
Usually. Older models were built to lower efficiency standards, and wear adds to the problem. A mid-1980s fridge can use about 1,200 kWh a year, against 350-450 kWh for a new one.
Which domestic appliances use most electricity?
Those that make heat or run constantly: heaters, water heaters, tumble dryers, ovens, dishwashers, washing machines, and fridge-freezers.
