By Will Browsberger A little over 10 years ago, my wife and I proposed to my parents that we downsize into a two-family house together and make it as energy efficient as possible. (See “Deep Energy Retrofit Shrinks Utility Bills,” Belmont Citizens Forum Newsletter, September 2010.) This is a story of four experiments. First, the living arrangement has worked out very well for all of us—we can be helpful in little ways to my parents and we feel very fortunate to see them more. Our only wish is that we had made the decision when the kids were younger. Second, [READ MORE]