Energy Efficiency in the Home

Question 1

What are 5 examples of insulation in the home?

Answer 1

1. Loft insulation
2. Hot water tank jacket
3. Cavity wall insulation
4. Draught- proofing

Question 2

What do the most effective methods of insulation do?

Answer 2

Give you the BIGGEST ANNUAL SAVING

Question 3

Define ‘biggest annual saving’

Answer 3

Saving you the most money each year on your heating bills

Question 4

Define ‘payback time’

Answer 4

The money you save on your heating bills EQUALING the initial cost of putting in the insulation

Question 5

What is the equation for payback time?

Answer 5

Payback time = initial cost / annual saving

e.g. £200 / £50 = 4 years

Question 6

What do the most COST EFFECTIVE methods tend to be?

Answer 6

The CHEAPEST

Question 7

What makes something ‘cost effective’?

Answer 7

Having a SHORT payback time

Question 8

What type of heat transfer/s does DRAUGHT-PROOFING reduce?

Answer 8

Convection

Question 9

What type of heat transfer/s does LOFT INSULATION reduce?

Answer 9

1. Conduction

2. Convection

Question 10

What type of heat transfer/s does CAVITY WALL INSULATION reduce?

Answer 10

1. Conduction
2. Convection
3. Radiation

Question 11

What type of heat transfer/s do THICK CURTAINS reduce?

Answer 11

1. Convection
2. Conduction
3. Radiation

Question 12

What type of heat transfer/s do WATER TANK JACKETS reduce?

Answer 12

1. Conduction

2. Convection

Question 13

What happens with ‘draught-proofing’?

Answer 13

Strips of foam and plastic around doors and windows stop draughts of cold air blowing in

Question 14

What happens with ‘loft insulation’?

Answer 14

A think layer of fibreglass wool laid out across the loft floor and ceiling reduces heat less from the house

Question 15

What happens with ‘cavity wall insulation’?

Answer 15

Foam squirted into the gap between the bricks reduces heat loss across the gap

Question 16

What happens with ‘thick curtains’?

Answer 16

Bid bits of cloth over the window create an AIR GAP between the room and the window, stopping hot air reaching the gas, and reduces heat loss

Question 17

What happens with ‘hot water tank jackets’?

Answer 17

Lagging such as fibreglass wool reduces heat loss

Question 18

What do U-values show?

Answer 18

How fast heat can transfer through a material

Question 19

Heat transfers FASTER through materials with ____ U-values

Answer 19

Heat transfers FASTER through materials with HIGHER U-values

Question 20

What is the relationship between insulators and U-values?

Answer 20

The BETTER the insulator the LOWER the U-value

Question 21

A lot of methods of insulation work by trapping a ____ ____ ____ because it’s a ____ ____ - it’s great for stopping heat by ____ .

Answer 21

A lot of methods of insulation work by trapping a LAYER OF AIR because it’s a GOOD INSULATOR - it’s great for stopping heat by CONDUCTION .