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Value Beyond Cost Savings - Green Building Finance Consortium

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<strong>Value</strong> <strong>Beyond</strong> <strong>Cost</strong> <strong>Savings</strong>: How to Underwrite Sustainable Propertiessustainable feature or outcome, the problem of evaluating a whole building, with acombination of sustainable features and outcomes, is also difficult.One framework that we particularly like that assists in understanding the statisticalrelationship between building science and health is one created by Mark Mendell, anepidemiologist working at Lawrence Berkeley National Laboratories, and a board memberof the <strong>Consortium</strong>. Dr. Mendell has created a practical framework for categorizing thebasis for believing something causes an adverse affect. His “What We Know” frameworkis summarized below.Documented causal relationshipsSignificant, replicated, consistent, unbiased, dose-related, plausiblePersuasive scientific findingsReplicated, significant findings, and alternate explanations seem unlikelySuggestive scientific findingsBut “correlation does not prove causation”Beliefs based on informal observationsSometimes guides and predicts future science, but sometimes based on error,coincidence, or hidden factorsDr. Mendell’s framework is similar to a related framework used by the Institute ofMedicine in their official reviews of health issues.Dose-response relationshipsWhile the studies linking indoor environmental quality, lighting, daylighting, temperaturecontrol, noise, and other sustainable outcomes to building health or productivity are robustin many cases, the studies are often insufficiently specific to enable a clear relationshipbetween the amount of the sustainable outcome (lighting, noise, etc.) and building healthor productivity. Accordingly, it makes it difficult to assess whether a particular building,with its sustainable outcomes or designed outcomes, will be sufficient to achieve theresults identified in the studies.This book and the Expanded Chapters cover the issues of health and productivity in manyplaces. The six-step process for financial analysis (Chapter V, Section A), clarifies thesteps required to assess how occupant performance (including health and productivitybenefits) influences occupant space demand which then influences rent, occupancy, tenantretention and other financial performance variables. The evidence supporting howsustainable properties affect occupant performance is further detailed in Expanded ChapterIV, Section F-4, Expanded Appendices IV-C and IV-D, and expanded Chapter V, SectionC2.156

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