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Way beyond me: Calculate ROI of home energy improvements... while also taking into account increases in energy prices
Hi,
I want to make an ROI energy improvements calculator. I've got this far: ----------------------- Improvement Cost Saving per year Cavity wall 750 150 Roof insulation 500 175 Total 1250 325 ROI: 3.8 years ----------------------- So far, so embarrassinly simple. However, I'd like to add a bit more... ----------------------- Probable yearly energy price increase: 12% Actual savings: Actual ROI: ----------------------- Any thoughts? Many thanks, Uberyes |
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Way beyond me: Calculate ROI of home energy improvements... while also taking into account increases in energy prices
Uberyes,
=NPER((4%-12%),325,-1250) The 12% is the assumed increase in energy costs, and 4% is the assumed loss of income if you had otherwise invested the funds... HTH, Bernie MS Excel MVP wrote in message ups.com... Hi, I want to make an ROI energy improvements calculator. I've got this far: ----------------------- Improvement Cost Saving per year Cavity wall 750 150 Roof insulation 500 175 Total 1250 325 ROI: 3.8 years ----------------------- So far, so embarrassinly simple. However, I'd like to add a bit more... ----------------------- Probable yearly energy price increase: 12% Actual savings: Actual ROI: ----------------------- Any thoughts? Many thanks, Uberyes |
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