Understanding retro commissioning

One of the biggest criticisms of the LEED process is its claim that using it will help save on operating costs, while in fact, many projects don’t reach that goal. Of course, until a building is completed and systems begin to operate, the owner doesn’t know how much energy the building really uses. Once a building has some history, energy models can be modified to make better projections for the building’s energy consumption. But the owner may not get all the answers if adequate metering systems are not in place to measure the energy loads of the building.