1/2 -- Overall Progress
(more charts below) Blue is Electricity, Violet is Propane, Cream is gasoline
Can we cut our energy use and green house gas emissions by 50%?
How hard is it?
What will it cost?
How much money will we save?
(1) The small print: This includes all energy to run and heat our home and gasoline to run the car (i.e. our total electricity, propane, and gasoline usage). It does NOT include the energy used to produce and distribute the things we buy or use. Maybe someone has some ideas on a program to address these areas?
Investing in energy saving projects to reduce green house gas emissions is a win-win situation -- you can do something that is good for the planet and also earn a good economic return.
The charts below show our reductions in energy use and green house gases, as well as the related costs and returns.
Details on the individual projects are here.
Some notes on the graphs:
Energy use in electricity, propane and gasoline are all expressed in kilowatt hours so that they can be compared easily. If you want to convert to the usual gallons: 1 gallon of gasoline = 36.6 KWH, and 1 gallon of propane = 27.0 KWH. And, if you want to convert to BTUs, there are 3412 BTU per KWH.
The "Base 2001" usage is from utility bills. Some of the "Completed" results are from utility bills, and some are from estimates, because the changes will not go into effect until the heating season. All of the "Future" results are from estimates. The projects descriptions give the methods I used to estimate energy use and GHG reductions -- I believe them to be reasonable estimates.
We have supplied the labor to do a number of the projects, so the dollars spent are lower as a result.
Updated 5/13/07 -- adjusted table to reflect actual numbers, and lowered price premium for Prius from $4000 to $3000 (incl tax saving).