Aids in the design of single- or multizone energy-efficient buildings where the loads are dominated by the dynamic interactions between the building's envelope, its environment, and its occupants. SUNREL is especially well suited for passive solar buildings and includes algorithms for Trombe walls, advanced glazings, schedulable window shading, active-charge/passive-discharge thermal storage, and natural ventilation. The program is a true simulation model based on time steps of one hour or less. The model representation of the building is a thermal network solved with forward finite differencing among other techniques. In addition, a simple graphical interface aids in creating input and viewing output.
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Retailer Energy Alliance (REA)-Restaurant members have expressed difficulty in prioritizing buildings within their portfolio for investments in energy saving upgrades. To meet this gap, this performance evaluation how-to guide and spreadsheet toolkit helps to identify poor performing buildings that will help owners prioritize use of capital resources for cost-effective energy efficiency measures. (For the how-to guide, see https://buildingdata.energy.gov/cbrd/resource/914)