Chemistry, 07.07.2020 07:01 plumagirl

Calculate the payback time if she insulates the loft with 300 mm insulation when: area of loft space = 100m^2 cost of roll of 100 mm thick loft insulation that covers 8.3m^2 = £20 cost of putting the insulation into the loft = £120 savings per year = £80 per 100 mm Payback Time = installation cost divided by annual savings

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Calculate the payback time if she insulates the loft with 300 mm insulation when: area of loft space...