Energy & Efficiency Flashcards
1
Q
Cavity wall insulation reduces…
A
Convection and radiation across the gap
Pockets of air in the foam reduce conduction
2
Q
Loft insulation reduces heat loss from…
A
Conduction
Convection
3
Q
Draught-proofing reduces heat loss from…
A
Convection
4
Q
Hot water tank jacket reduces…
A
Conduction
Radiation
5
Q
Thick curtains reduce heat loss from…
A
Conduction
Radiation
6
Q
U-values show…
A
How fast heat can transfer through a material
7
Q
Heat transfers _____ through materials with higher U-values.
A
Faster
8
Q
Efficiency is calculated by…
A
Efficiency = Useful energy out divided by Total energy in
