I often find interesting content on RESNET‘s Facebook page and today was no exception. With the hashtag #howlowcanyougo, followers were prompted to enter noteworthy HERS scores. The question is a great one and engages people in the discussion of energy efficiency, or does it? As I have discussed in a previous post “Real Energy Efficiency Can’t Be Bought” I make the case for true energy efficiency being about the building envelope, SIPs or otherwise. Alternative energy is an effective strategy that should follow, not proceed, building energy efficiency.