Energy Efficiency in the Home Flashcards
Name each type of way to save energy in the home (5)
Loft insulation Cavity Wall Insulation Hot water tank jacket Double glazing Draught - proofing
How much does Loft insulation cost initially? What is the annual saving?
£200
Annual : £50
How much does Cavity wall insulation cost initially? What is the annual saving?
£500
Annual: £70
How much does hot water tank jacket cost initially? What is the annual saving?
£15
Annual: £30
How much does double glazing cost initially? What is the annual saving?
£3000
Annual: £60
How much does draught proofing cost initially? What is the annual saving?
£100
Annual: £50
The most effective methods of insulation are those that give you the biggest [ ]
Annual saving
What is the equation for payback time?
Payback time = Initial cost / annual saving
Why would something be costeffective?
Short payback time
Describe draught proofing and how it works
Strips of foam and plastic around doors and windows stop draughts of cold air blowing in - reduce heat lost due to convection
Describe loft insulation and how it works
A thick layer of fibreglass wool laid out across the whole loft floor reduces conduction and radiation into the roof space from the ceiling
Describe thick curtains and how it works as insulation
Big bits of cloth over the window to reduce heat loss by conduction and radiation
Describe Hot water tank jacket and how it works
Lagging such as fibreglass wool reduces conduction and radiation
Describe the U-Value
The BETTER the insulator the LOWER the U-value
