Part of the specification is to explain how...
-cavity wall insulation
-hot water tank jackets
...reduce heat transfer.
However, every textbook I read and video I watch say that they cut out different types of heat transfer! E.g, one video will say that cavity wall insulation reduces convection and radiation, and another says it reduces conduction and radiation.
Could someone confirm what each of these instalments actually reduce?
AQA P1 - Energy Efficiency In The Home? watch
- Thread Starter
- 28-04-2016 19:56
- 28-04-2016 20:00
- the roof - fit loft insulation
- windows - fit double glazing and curtains
- gaps around the door - fit draught excluders
- the walls - fit cavity wall insulation
- the floor - fit a carpet
There are some simple ways to reduce heat loss, including fitting carpets, curtains and draught excluders. Heat loss through windows can be reduced by using double glazing. There can be either air or a vacuum between the two panes of glass. Air is a poor conductor of heat, while a vacuum can only transfer heat energy by radiation. Heat loss through walls can be reduced using cavity wall insulation. This involves blowing insulating material into the gap between the brick and the inside wall, which reduces the heat loss by conduction. The material also prevents air circulating inside the cavity, therefore reducing heat loss by convection. Heat loss through the roof can be reduced by laying loft insulation. This works in a similar way to cavity wall insulation.