Nice worksheet, FM.
I'd like to adapt it to determine the least cost heating cycle for our rented house that maintains a reasonable temperature when people are awake. In addition, there's not a lot I can do to improve insulation or efficiency, as we're not allowed to modify the property. However, the house has retained the original single-glazed window panes and it would be interesting to see if insulating film on the windows would be cost-effective.
Actually seeing how much domestic energy people use can be somewhat shocking. I did a quick Mathcad calculation on how much electricity our light bulbs used during a year and wished I hadn't I now shout at the children for leaving bedrooms on, and I've removed the light bulb from the refrigerator.
Stuart
