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commercial building
Slipstream’s field study found that programs that add retro-commissioning (RCx) can recapture energy savings that are lost as buildings age. Our report outlines triggers to identify the most promising targets for RCx and the important role training can play. Read more
PCM in action day and night
Should phase change materials be a part of your commercial building energy efficiency plan? Would you like to reduce peak electricity demand by 4-7% through a non-invasive retrofit? Perhaps you should consider phase change materials (PCMs) as one of your efficiency measures. Read more
photo of building professionals
Can utilities affect changes to building codes to improve energy savings? How feasible is it for utilities to increase cost-effective energy savings by influencing state or local building codes? We worked with an Illinois utility to find out. We reviewed information on how other states, most notably California, incorporated code programs in their portfolio. We investigated methods for attributing savings from these programs and interviewed Illinois stakeholders for their perspective on opportunities for code programs. Read more
Energy savings and lessons learned from observed, practical approaches to demand control ventilation Demand control ventilation (DCV) systems use sensors — generally either CO2 or occupancy sensors — to estimate the actual number of people in an area and supply only as much ventilation air as is needed at a given time. DCV has the potential to save a substantial portion of building energy use in extreme climates like the northern Midwest. Read more
Commissioning and retro-commissioning (RCx) are critical in propelling building performance—but what happens once retro-commissioning is complete? Do the energy savings continue long after installation? And why do some buildings see long-lasting results, while others don't? We set off to answer these questions and more through a comprehensive study of the persistence of energy savings.  Read more
I model
I think my work is very cool and I love it—well, mostly—because sometimes I think energy modeling needs the calmness of a Zen master and the strength of a matador! Modeling predicts annual energy use of buildings before they are built. It computes peak loads, energy use intensities and energy split for different end uses, in intervals as short as five minutes. I use modeling results to help design buildings that will be energy efficient. Modeling is a complex process that never leads to a generic solution. (Have I made my case yet that energy modeling is very, very glam?) Read more