Energy Efficiency in The Home Flashcards
Effectiveness and cost-effectiveness are what?
Not the same.
The most effective methods of insulation are what?
Ones that give you the biggest annual saving.
Eventually what will happen?
The money you’ve saved on heating bills will equal the initial cost of putting in the insulation.
The time it takes for the money you’ve saved to be equal with the initial cost of the insulation is called what?
Payback time.
The most cost-effective methods are what?
The cheapest.
Some insulation is most cost-effective because…
They have a short payback time.
Name 5 heat transfers.
Cavity wall insulation. Loft insulation. Draught-proofing. Hot water tank jacket. Thick curtains.
What is cavity wall insulation?
Foam squirted in the gap between the bricks.
Pockets of air in the foam reduce heat transfer by conduction.
What does cavity wall insulation reduce?
Convection and radiation across the gap.
What is loft insulation?
A thick layer of fibreglass wool laid out across the loft floor and ceiling.
What does loft insulation reduce?
Reduces heat loss from the house by conduction and convection.
What is draught-proofing?
Strips of foam and plastic around the doors and windows.
Stops draughts of cold air blowing in.
What does draught-proofing reduce?
Heat loss by convection.
What is hot water tank jackets?
Lagging such as fibreglass wool.
What does hot water tank jackets reduce?
Conduction and radiation.
