We caught up with two of USGBC's existing buildings gurus to get the their take on the facts, figures, and future of the movement - including the evolution of LEED for Existing Buildings: Operations & Maintenance.
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Existing buildings: They're everywhere! Seattle skyline - Source: Jordan R. MacDonald |
Let's start simple: What are the key principles behind LEED for Existing Buildings: Operations and Maintenance? What's the point of greening our existing building stock, and what does it involve?
Lauren Riggs: As I see it, the primary role for LEED EB: O&M in the market is to provide a platform for existing buildings to demonstrate their success in implementing sustainable operations strategies. The majority of buildings are not new - and in fact have been in operation for quite some time; LEED EB: O&M is available to set these buildings up for optimal performance. The point of “greening our existing buildings stock” is to realize the massive potential that such a large number of buildings has to positively impact the environment through efficient operations.
What does this involve? Commitment to the ongoing process of operating a building sustainably. Start with practical and sustainable practices, implement them and update along the way – key words “update along the way.” If LEED EB: O&M projects continually try to make their processes better, they will see the full value of the rating system.
Christopher Davis: Look, the annual replacement rate of buildings (the percent of the total building stock newly constructed or majorly renovated each year) has historically been about 2%, and during the economic recession and subsequent years, it's been much lower. Even if we succeed in making half of those new buildings green, that doesn’t sound like a very urgent response to a crisis. We're deluding ourselves if we think we can solve all of our problems just with new, super efficient buildings. Existing buildings are, to borrow a phrase, the 99%, and we need to pay serious attention to them. Greening existing buildings is incredibly important for our planet, but it makes exceptionally good economic sense. Last year when the Empire State Building achieved Gold using LEED EB: O&M, they were a little over halfway through a deep energy retrofit program projected to cut annual energy costs by 38%. Just a few weeks ago they announced that in the first year they've exceeded their projections by 5%, already saving $2.4 million. Just think what kind of impact we can have if every aging building with leaky windows and inefficient chillers invested in these kinds of improvements. That's the kind of innovation that LEED EB: O&M is trying to stimulate.