house insulation

Question 1

install double gazing to

Answer 1

reduce conduction

Question 2

install draught excluders to

Answer 2

reduce cold air from convection currents

Question 3

install lost insulation to

Answer 3

reduce conduction

Question 4

install carpets and curtains to

Answer 4

reduce convection

Question 5

install radiator foil to

Answer 5

reduce infrared radiation

Question 6

install cavity wall to

Answer 6

reduce conduction

Question 7

what does payback time tell us

Answer 7

tells us how much time it takes to make our money back in savings after paying for house insulations

Question 8

equation for payback time (not given in data sheet)

Answer 8

payback time = cost of insulation/savings per year

Question 9

equation for cost effectiveness (not given in data sheet)

Answer 9

cost effectiveness = savings per year/cost of insulation

Question 10

what is the definition of a u-value

Answer 10

1) this is how how good of and insulator the item is.
2) indicates how much heat transfers through an item
3) so if we are looking for good insulates lower u-values are better