# Question: assuming a households appliances are all upgraded to 5 star...

###### Question details

Assuming a house-holds appliances are all upgraded to 5 star energy ratings, the unconstrained economic analysis outputs the following:

1. * Initial Cost of the Appliances* =
$1624

2. * Annual Return* = $38.78

**Task**: Compute the payback period by performing
an 8 year unconstrained economic analysis and simply payback
period. From this analysis, comment on whether a change in the
energy rating of the appliances is cost-effective or not.