Flashcards
Energy Efficiency in the Home
Cards in this deck (9)
- 1List five ways to cut down on energy loss in the home.1) Loft insulation
2) Hot water Tank Jacket
3) Double glazing
4) Draught-proofing
5) Cavity wall insulation - 2What is the equation for pay back time?payback time= initial cost/ annual saving
- 3What is cavity wall insulation? What does it protect against?Foam squirted into the gap between bricks reduces convection and radiation.
- 4What is loft insulation? What does it protect against?A thick layer if fiberglass wool laid out across a whole floor reduces conduction and radiation into the roof space from the ceiling
- 5What is draught-proofing? What does it protect against?Strips of foam and plastic around the doors and windows stop the draughts of cold air blowing in. This reduces heat loss through convection.
- 6What is a hot water tank jacket? What does it protect against?Lagging such as fiber glass wool reduces conduction and radiation
- 7What are U-values?They show us how fast heat transfers through a material
- 8What does a higher U-value mean?Heat transfers faster through the material
- 9The better the insulator...... the lower the U-value