Energy efficiency means getting the result you need while using less energy. So, you can cut waste without simply going without heating, lighting or other things you need.
What Is Energy Efficiency?
Energy efficiency is about how well energy is used.
For example, two homes may be kept at the same temperature. However, one may need much more energy because it loses heat faster.
The same idea applies to appliances.
Two products may do the same job, but one may use less electricity.
So, energy efficiency is not simply about using less.
It is about using energy better.
Efficiency and Energy Saving
These ideas are closely linked, but they are not quite the same.
You can save energy by doing something less.
For example:
Using a tumble dryer less often → energy saving
You can also save energy by making something more efficient.
For example:
Improving insulation → less energy needed to keep the home warm
Both can lower energy use.
However, the second example improves how well the home uses the energy in the first place.
Start With Heat Loss
Heating can be a major part of home energy use.
However, once heat enters your home, it starts to escape.
Heat can leave through:
- the roof
- walls
- windows
- doors
- floors
- gaps and draughts
So, a home that loses heat quickly needs more heating to stay warm.
Reducing that heat loss can make the home easier to keep comfortable.
Learn more: Insulation and Heat Loss →
Stop Unwanted Draughts
Some ventilation is needed to help manage moisture and keep indoor air healthy.
However, uncontrolled draughts can let warm air escape and cold air enter.
Common problem areas include:
- gaps around windows
- gaps around doors
- letterboxes
- unused chimneys
- gaps around floors or pipes
So, sealing unwanted gaps can help.
However, don’t block vents or other openings that are needed for safe ventilation.
Learn more: Draught Proofing and Ventilation →
Windows, Doors and Floors
Heat can also escape through windows, doors and floors.
There are several ways to reduce this.
For example:
- better glazing
- well-fitting doors
- suitable floor insulation
- curtains or blinds
- sealing unwanted gaps
Some changes cost very little. Others can be expensive.
So, start with the problems that are most likely to make a useful difference in your home.
Learn more: Windows, Doors and Floors →
Use Heating Well
A well-insulated home can still waste energy if the heating is poorly controlled.
So, also look at:
- heating times
- room temperature
- radiator controls
- rooms you rarely use
- hot-water settings
The aim is simple:
Heat the home when and where you need it.
Learn more: Boiler and Heating Controls →
Appliances Matter Too
Heating is only one part of energy use.
Your home also uses electricity for things such as:
- fridges and freezers
- washing machines
- tumble dryers
- dishwashers
- televisions
- computers
- cooking
- lighting
Some appliances use much more energy than others.
Also, how long you use an appliance can matter as much as its power.
Learn more: Appliance Electricity Use →
Check Energy Labels
Many new appliances have an energy label.
This can help you compare similar products.
However, don’t look only at the letter on the label.
Also, check the stated energy use.
A larger appliance may use more energy overall even if it has a good efficiency rating.
So, compare products that meet the same need.
Learn more: Energy Labels →
Does Newer Always Mean Better?
No.
A newer product may be more efficient. However, replacing something that still works also costs money.
So, don’t replace an appliance simply because a newer model uses less energy.
Instead, consider:
- how much the old appliance uses
- how much the new one would use
- how often you use it
- the purchase price
- how much money you could actually save
Then you can decide whether replacing it makes sense.
Small Changes or Big Changes?
Energy improvements range from very small changes to major building work.
For example:
Smaller changes
- adjust heating times
- stop unwanted draughts
- use appliance settings well
- switch things off when not needed
Larger changes
- add insulation
- replace windows
- improve the heating system
- install a heat pump
- add solar panels
A large project is not automatically the best first step.
Instead, look at the cost, likely saving and effect on comfort.
Look at Your Own Home
General advice can help. However, every home is different.
For example, one home may have poor loft insulation.
Another may have good insulation but old heating controls.
A third may use a lot of electricity through appliances.
So, try to find where your energy is going.
Your bills, meter readings and smart-meter data can all help.
Your EPC Can Help
An Energy Performance Certificate, or EPC, gives information about the energy performance of a property.
It can also suggest possible improvements.
However, an EPC is a model of the property. It is not a record of exactly how much energy you personally use.
So, use it as one source of information rather than treating it as your actual energy bill.
Learn more: Understanding Your EPC →
Start With the Easy Wins
Before spending a lot of money, check the basics.
Ask:
- Am I heating rooms when I don’t need to?
- Is heat escaping through obvious gaps?
- Could insulation be improved?
- Which appliances use the most electricity?
- Am I paying attention to both energy use and energy price?
Then, start with changes that offer a useful benefit for a sensible cost.
Key Points
Energy efficiency means getting what you need while using less energy.
So, first look for waste.
Then, look at heat loss, heating controls and appliance use.
Also, compare the cost of an improvement with the likely benefit.
Most importantly, don’t assume that the biggest or most expensive change must come first.
Find where energy is being wasted. Then deal with the problem that matters most.
Next: Insulation and Heat Loss →