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Energy Efficency
in the home
| Question | Answer |
|---|---|
| what is the equation for payback time? | initial cost/annual saving |
| what are the most effective methods of insulation? | the ones that give you the biggest annual saving |
| what is payback time? | the time it takes for the money you have saved on heating bills equals the initial cost of the insulation |
| what is cavity wall insulation? | foam squirted into the gap between the bricks stops convection currents and radiation across the gap |
| what is loft insulation? | a thick layer of fibreglass wool laid out across the whole lost floor reduced conduction and radiation into the roof space from the ceiling |
| what is draught proofing? | strips of foam and plastic around doors and windows. reduce heat loss due to convection |
| what is a hot water tank jacket? | lagging such as fibreglass wool that reduces conduction and radiation |
| what do thick curtain do? | reduce heat loss by conduction and radiation |
| what are U-Values? | they show how fast heat can transfer through a material |
| does heat transfer faster with higher u-values or materials with low u-values? | higher u-values |
| so the better the insulator... | the lower the u-value |
Created by:
rv1
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