Low cost/no cost tips to cut energy bills

Temperature control

The warmer your home is, the more heat it loses, so try not to heat it more than you need to be comfortable. Here are some tips.

Turn down the thermostat a degree or two

Turning down the thermostat by just 1C could save you 8% on the space heating part of your bill. However, different people need different temperatures. Many healthy active people are comfortable at 17C or even less, if they are wearing suitable clothes. Vulnerable people including the elderly, or the very young, or people with limited movement, usually need to be warmer, at least 18C and probably higher.

It is best to change this a little at a time - even just half a degree - and see how you feel. Put on a warmer woolly and make sure you move about and do something every now and again - at least look out the window or make a cup of tea. It isn't good for you to sit still for hours at a stretch in any case. If you feel cold at first, persevere for a week or two and see if you get used to it. If not then turn it up again but if you feel comfortable try lowering the temperature a little more.

Set the timer to turn off heating 30 minutes before you go to bed

Your home probably takes an hour or so to cool down after the heating goes off so you should be able to turn the heating off half an hour before you go to bed without any discomfort. If you normally heat for 8 hours in the day, you have just saved about 5%.

Turn down the radiators in less used rooms

If you have thermostatic radiator valves (TRVs) you can twiddle them up and down according to need. If you have a spare room, turning that one down could save you 4% on space heating, or 8% of the room has two outside walls and you donít have wall insulation. You can also turn the heating down in bedrooms you donít use during the day and turn them up again half an hour before you go to bed.

Heating one room only

If you mainly occupy one room only you could turn the central heating right down and use an alternative form of heating (if available) for that room. However, be aware that modern gas central heating is very efficient so if you use a gas fire with an open flue instead it will use up to three times as much gas for the same heating effect Ė the rest goes up the chimney. If your gas fire has a balanced flue then this is not such a problem. An electric fire keeps all the heat in the room but electricity is more expensive than gas or oil. Also, not heating the rest of the house may contribute to damp problems, if warm, moist air from the heated area leaks into the unheated areas.

Other ideas

  • Move the thermostat out of the hall because in there it will get a cold draught every time you open the front door which isn't necessarily enough to cool down the rest of your home, so you don't always want to trigger the boiler
  • A wireless thermostat you can take with you between rooms, especially useful if your fixed thermostat is in the hall which you donít want to heat anyway.
  • Optimum start heating control turns the heating on later when it isnít very cold outside and it wonít take long to heat up - so you don't need to keep adjusting the start time as the weather gets colder/warmer.
  • Heat yourself, not the room. For example you could try a heated pad for your feet.

There is lots more advice for controlling your central heating system here

Reducing heat loss

If your home is draughty, fixing those leaks is the quickest way to reduce heat loss and very cost effective. Insulating lofts, walls and floors is also important and upgrading your windows.

However, there are also some other quick wins I should mention here:

Heavy thermal curtains

Fitting thick curtains (or roller blinds or, even better, honeycomb blinds) can reduce heat loss through single glazed sash windows by around 15%. Even if you have double glazing, it is worth closing the curtains at night.

Curtains for doors

If your front door leads straight into the living room it could do with a curtain, even if it doesnít have a window. Most doors arenít very thick. Ideally the curtain should go right down to floor level but this is annoying if it drags: portiere rods have a lever action which lifts the curtain slightly when the door is opened.

Curtain fixed to a portiere rod: as the door opens the rod is pushed away from the wall and the pivot forces it up, lifting the curtain above the ground Thanks to Penny for these pictures

Keep curtains behind radiators

Many homes have radiators under windows but when you close the curtains you want the radiators to heat in front of them, not behind. So tuck the curtains behind the radiator if they are long enough. Better still, fit a shelf (extend the window sill) above the radiator to guide the rising warm air into the room and away from the glass.

Single glazed windows? Try secondary glazing film

Double glazing and glass secondary glazing is expensive but there are some more economical solutions. The cheapest is to fit secondary glazing film Ė not as good as glass but it traps an insulating layer of warm air between the film and the glass. This video shows you how to fix it. (This film is advertising a particular product called Easyfix but there are others such as ĎStormguardí). This solution is good for windows that you donít need to open.

Close up chimneys with open flues

If you chimney has an open flue, it is very likely the biggest heat loss in the room. Some chimneys have a flap you can close to control the air flow Ė so keep it closed when you arenít running a fire. Otherwise, use a chimney balloon or just a bag stuffed with newspaper. (You must leave some ventilation through the chimney or it wonít dry out if it gets damp with rain).

Put foil behind radiators on outside walls

You want the heat from your radiator to go into the room, not into the wall and outside. With a thermal camera it is often possible to see warm patches under windows from radiators. So fit a reflective panel, or even just some foil, on the wall behind the radiator. (It is important that the panel does not touch the radiator.)

Improving heating efficiency

Get an A rated boiler

If you have a gas boiler and radiators, make sure it is an efficient A-rated boiler and use it effectively Ė see our advice on temperature settings. If you arenít sure if your boiler is a good one, check the sedbuk boiler database to see how it is rated. Upgrading from a D rated boiler to an A should save you about 10% on your heating bill and upgrading from a G to an A should save you 20%.

Reduce the radiator temperature

If you have a condensing boiler, but your radiators are too hot to touch then you are probably not getting the best efficiency from your boiler. You could get up to 8% improvement or even more by reducing the temperature which feeds the radiators so that the temperature in the water returning to the boiler is well below 50C. Above 50C you will hardly be condensing the flue gases at all!

This is normally straightforward for combi boilers but with regular boilers, which heat a hot water cylinder as well, you may not be able to control the radiator temperature separate from the hot water temperature.

Find our more from The Heating Hub

Check your radiators

Make sure your radiators are working properly. When they are warm the whole radiator should be warm: if they are cold at the top you probably have an airlock and they need bleeding which is very easy to fix; if they are cold at the bottom they may be blocked with scale or sludge. See My radiators arenít warming up evenly. What is wrong?.

Donít hide your radiators

Radiators need good air flow around them to transfer their heat into the room. Placing a sofa in front tends to block the heat in (and probably isnít that good for the sofa either).

Use a wood stove

If you have a source of waste wood, then running a wood stove is very cheap and even if you havenít it is lower on carbon emissions. Stoves are much more efficient than an open fire because you have fine control of the air flow. That means you burn the wood completely and minimise losses through hot air going straight up the chimney. We have more advice on running a wood stove here.

Hot water savings

It takes a surprising amount of energy to heat up water so it is a shame to waste it. Here are some tips.

Wrap up your hot water cylinder and pipes

If you have a hot water cylinder then it is constantly losing heat. That may not be such a bad thing - it might make your bathroom cosy - but if it isn't where you want heat then it is a waste. So make sure it is well insulated. Modern cylinders have built in insulation but older copper cylinders should have a thick insulating jacket; if haven't got a proper jacket for it, wrapping it up in an old quilt is a great deal better than nothing. In fact giving it a second jacket is not a bad idea if you have room.

It is also important to insulate the pipes between the cylinder and the boiler. These run very hot to warm the cylinder so can lose a lot of heat. Also, if you don't have a thermostat on the cylinder then your boiler will be checking the temperature of the returning water to see if your cylinder is up to heat. If your pipes aren't lagged and they are losing a lot of heat then the boiler will think your cylinder is not hot enough. It is easy to fit foam insulation around the pipes, provided you can get to them.

Check the cylinder thermostat

The hotter your cylinder is, the more heat it loses, so don't heat it more than you need. It should be heated to 60C to avoid any risk of legionella bacteria growth. However you probably don't need to to go any hotter than that unless you use a lot of hot water.

Showers: aerating shower heads and egg timers

Do you need a tropical rain storm or will a shower do? Fitting an aerating shower head can make a shower feel more like a deluge. However, only do this if you have good water pressure. Also, shorter showers use less water. Use an egg timer to remind you how long you are taking. Doing both of these could save you £9/year. Savings based on 7 min. at 8l/min. shower reduced to 5 min. at 5l/min. 5 times per week, 90% efficient boiler

Wash up less often

How long do you have to wait before the kitchen tap runs hot? This is water that has been sitting in the pipes. It was hot once but has gone cold. Every time you wait for the tap to run hot you are wasting heat. So wash up once a day instead of every time you use a plate. If you avoid waiting for the tap to run hot three times a day, you could save £10/year
Savings based on 4 litres, 3 times/day, assume 90% efficient boiler.

Avoid using cold 'hot' water

When you run the hot tap and it runs cold to start with, do you wait for it to get hot? If you aren't going to wait, why not just use cold instead? Every time you run the hot tap you are draining hot water from your cylinder, even if it doesn't get as far as the tap on that occasion. Or if you have a combi boiler, running the hot tap turns the boiler on, using a certain amount of fuel however little water you use.

Saving on appliances

(All cost calculation are based on 14p/kWh)

Let the sun dry your washing

Running the tumble dryer uses 1.2 kWh on average but could use up to 3 kWh (that is 42p per run). If you have a garden and the sun is shining, use a washing line and do it for free! However if you must dry indoors make sure the room is well ventilated because that much damp can cause condensation and mould.

Fit energy saving lightbulbs

Don't wait for your old incandescent bulbs to blow before replacing them, at least for all the lights you use frequently. If you replace a 50W light bulb with a 11W CFL and you use it on average 2 hours per day you will save £5 over a year - about twice the cost of the light bulb. By the way, halogens are only a little more efficient than ordinary incandescents. If you have halogen spots consider replacing them with LEDs.

LEDs are more expensive than CFLs but will still pay for themselves in time. They are better than CFLs in some circumstances:

  • to replace halogens (where CFLs don't fit).
  • for use with dimmer switches because CFLs are not very efficient when used with dimmers
  • outdoors because CFLs do not work so well when cold

Turn the TV off when you aren't watching

An average LCD TV could use 100W. If you turn it off when you aren't watching it and that is 1 hour per day you save £5 in the year.

When you are buying new appliances, check the energy label

Many electrical appliances now need energy labels giving their energy rating and estimated annual energy consumption (kWh). Do look at the labels when you are selecting an appliance. The rating scale was adjusted back to 'A' to 'G' in March 2021 but the old scale - going up to 'A+++' in some cases - may still be used. In any case the annual kWh is much more useful than the energy rating because the rating only says how the appliance compares with similar ones. Larger appliances and ones with more features can use more electricity for the same rating. So only buy the size you need and don't go for fancy features that use more energy unless you are really likely to use them.

Note that for things like washing machines and TVs the annual kWh is based on 'average' use - you may use them more or less than this. So you can use the annual kWh to say which appliances use more and which less, but don't believe that the actual value is accurate in your case.

Boil just the water you need

It takes a surprising amount of energy to heat water. If you boil 1 pt more than you need, 4 times a day, over the year you will spend an extra £11.60

Measure your electricity use

There are two ways to find out where you are using electricity the most:

  • Use a plug in monitor, fits into a plug socket, measures an appliance such as a washing machine or a TV (ask us about borrowing one).
  • Check how much electricity you are drawing from the grid, using your smart meter in-home-display. If you do not have a smart meter, you can get monitors that clip onto the supply leads or that read your old style meter either by counting the LED flashes or by reading the digits. Try searching for 'electricity monitor' - there is a range of types here. If you have solar PV panels then you will need to do these tests when it is dark outside as otherwise you will be using your own power as well as the grid. (Some monitors can handle this and monitor both but they are more expensive.)

Using a plug-in monitor you can check your TVs, HiFis games consoles and so on for standby power. Older appliances can have significant consumption when on standby but most items bought since 2010 should use less than 1W (because of EU regulations). That doesn't apply though to set top boxes, DVR devices and many games consoles because they don't have a standby mode as such. Some of them do have an eco mode, though you may have to configure them to activate it - for example Sky STBs have one.

Also, try Nicola's electricity calculator.

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