Saving energy: These are the 8 biggest energy guzzlers in the house


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They are not common, but they add a huge amount to the electricity bill. We give tips on which energy guzzlers you should watch out for in the household.

It is not uncommon for a glance at the annual electricity bill to end with a nasty surprise. How does such a high final amount come about? In addition to refrigerators and freezers, stoves, washing machines and all the smaller consumers in the house, there are also really big energy guzzlers. Here are eight of them. 

1. Whirlpool and sauna: 2500 to 7500 kilowatt hours per year

energy guzzlers

The spa area in your own house or garden – that is pure luxury, but it also has its price. Because not only the installation of a sauna or a whirlpool costs a lot of money. The energy costs should not be underestimated either. 

The annual power consumption of a jacuzzi or whirlpool installed outdoors is between 2500 and 7500 kilowatt hours (kWh). With electricity costs of 1000 euros and more per year must be expected for relaxation in the bubbling water. For comparison: A standard four-person household without electrical heating consumes around 3500 kWh of electricity annually. 

The average power consumption of a home sauna is around 15 kWh for two hours of use including preheating. The infrared cabin has a significantly shorter preheating time with two to four kWh. 

2. Plasma TV: 400 to 600 kWh per year

energy guzzlers

In terms of picture quality, large plasma televisions are characterized by their pure colors – but they consume much more electricity than an LED device. In order to light up a pixel, one plasma cell must be “ignited” at a time. 

With a bright picture – in over 90 percent of the service life – the energy consumption is significantly higher than that of LED devices. With the same screen diagonal (46 inches) and resolution (UHD), it is not uncommon for a plasma device to draw 160 watts from the socket, while a modern LED device is content with just 45 watts. 

In any case, attention should be paid to the screen settings – lowering the brightness can reduce power consumption. 

3. Heating pump: 400 to 600 kWh per year

energy guzzlers

Technically outdated circulation pumps are among the largest consumers of electricity in the house. The circulation pump runs during the entire heating season and causes electricity costs of 100 or more euros per year. 

With a speed-controlled high-efficiency pump, power consumption can be reduced by up to 90 percent. A high-efficiency pump costs around 400 euros with installation, the state pays up to 30 percent of the costs. The investment pays for itself after a few years.

4. Electric Boiler: around 900 kWh per person

energy guzzlers

A four-person household needs an average of 160 liters of hot water per day. Nine kWh are required for this every day. If this consumption is covered with a well-insulated electric boiler, which still has standby losses of around one kilowatt hour per day, this results in a total electricity consumption of over 3000 kWh per year and electricity costs of 1000 euros. 

The electrical hot water preparation is therefore a very cost-intensive variant of the hot water preparation, provided that the electricity does not come from the in-house photovoltaic system. 

Energy can be saved by using economical shower heads and switching off the boiler when it is not used for a long time.

5. Water bed: 300 to 400 kWh

energy guzzlers

The manufacturers of waterbeds promise their customers a comfortable sleep and a positive effect on back pain. To achieve this, the water has to be heated. The set temperature has a decisive influence on power consumption. 

As a rule, around 300 kWh per year and costs of around 100 euros can be expected. Among other things, a timer integrated in the thermostat of the waterbed heater helps to save electricity. If the bed is not used during the day, it does not need to be heated. 

Energy consumption can also be reduced by using an insulating pad. It reduces heat loss through the lying surface.

6. Hot water circulation: 150 to 200 kWh

energy guzzlers

A circulation pump circulates the hot water between the hot water tank and the taps. This ensures that hot water comes out of the shower and tap immediately. However, this convenience consumes electricity and heating energy around the clock. 

There are opportunities for savings – for example with the help of timers. This allows the circulation pump to be adapted to the individual daily routine. 

An alternative is the installation of a demand-controlled circulation pump that only works when hot water is actually used. 

7. Computer as server is one of the energy guzzlers: 1200 kWh

energy guzzlers

A PC with a modern multi-core processor draws around 135 watts from the mains. With a daily running time of four hours, the annual electricity costs add up to around 60 euros. 

Upgraded game computers consume around four times as much electricity and are often used for much longer. It is also expensive to use your PC as a server for running your own homepage. 

The computer then runs 24 hours a day. It is much cheaper to run the homepage via an external server. 

8. Electric underfloor heating and towel radiators

energy guzzlers

Electric underfloor heating in the bathroom is pleasant, but electricity and cost-intensive. With a ten square meter bathroom, annual electricity costs of 300 euros and more must be expected. With full-time operation, power consumption can increase four times. The same applies to electric towel radiators.


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