What was most surprising? Well, certainly not that I live in a very inefficient home---I already knew that. I rent, and it's old, it's got old appliances, very little insulation, hilariously drafty windows, etc. Unfortunately, there is little that I can actually do to improve it beyond my limited ability to make improvements as a tenant. Do I move? Do I hassle my landlord? Most efficiency improvements, and certainly the most effective ones, are off limits to those who rent, which makes it hard to live efficiently in a city like Portland where much of the rental space is still fairly old. Although that is changing, and bringing new problems with it.