# Energy in the homePage 3

#### WATCH ALL SLIDES

energy

Collect a sheet of graph paper and put the information on to

A bar chart.

Questions.

_

Which thre appliances use the most energy?

What do these appliances produce?

Slide 18

## Paying for bills

energy

To calculate the following bills,you must take the previous reading

away from the present reading.Then you must multiply the units by

the cost of one unit which is 7p.Then you add on the fixed charge

Bill A

Present previous units fixed charge amount

15600 15300 7p £10 -------

Bill B

Present previous cubic metres kWh charges

5500 100 3082

Slide 19

## Paying for bills cont`d

energy

Bill B cont`d

Standing charge £8.37

Charge per kWh = 1.6p Total =

Slide 20

## Energy losses

energy

Energy can be lost from our homes in a variety of ways -:

Walls

£50

Roof

£75

Door

£25

Windows

£50

Slide 21

energy

energy losses

As can be seen from the previous slide,energy can be lost from

walls, roofs, doors and windows.

To reduce these losses and in doing so ,save money,there are a

number of ways this can be done.We have to make use of various

ways of insulating our homes.

Draught proofing 2. Lagging pipes

Laying carpets 4. Loft insulation

5. Double glazing 6. Wall insulation

Slide 22

energy

energy losses

DRAUGHT PROOFING

If a door or window does not shut tightly,cold air can blow in.By

using plastic materials which mould into the shape of the gap,we can

reduce the losses.

LAGGING PIPES

When hot water is going through pipes below the floor or in the loft,

it can cool quickly.Lagging is a covering of fabric or foam which

can cut this type of loss.

Slide 23

energy

energy losses

LAYING CARPETS

Carpets look nice on the eye but they also provide good insulation

for a room by keeping heat from escaping through the floorboards.

LOFT INSULATION

A thick glass wool layer up in the loft will stop heat going through

the roof.

Slide 24

ENERGY

ENERGY LOSSES

DOUBLE GLAZING

This method of insulation sees two glass panels separated by an

air free space.A side view is shown below.

glass

glass

air free space

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