heat loss, payback time and density Flashcards
1
Q
how is heat lost from our houses?
A
- floor
- roof
- windows
- walls
2
Q
what are the ways to insulate the home?
A
- double glazed windows
- loft insulation
- draft proof doors
3
Q
what is the payback time?
A
payback time of an object is how long it takes for the object to pay for itself
4
Q
how to calculate the payback time?
A
installation cost divided by the annual saving
