Yes, and I'd add that buildings have different lifespans, and we wouldn't want to interrupt and make a major retrofit to a building if that chiller or boiler, for example, didn't need to come out yet. We do look at this in the short term for some retrofits, but it certainly is a long-term game. Whether it takes you five years or 10 years to do, there should be a plan in place to get you to a certain target.
On March 5th, 2013. See this statement in context.