RP-1050 — Development of a Toolkit for Calculating Linear, Change-Point Linear and Multiple-Linear Inverse Building Energy Analysis Models

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ASHRAE Guideline 14p specifies guidelines for measuring energy savings from building energy-conservation retrofits. A primary method for measuring retrofit savings recommended by ASHRAE Guideline 14p involves identifying a regression model of baseline, or pre-retrofit, energy use as a function of influential variables, such as weather or occupancy, which may change between the pre- and post-retrofit periods. The regression model is then used to preduct how much energy the building would have consumed in the post-retrofit period, or as the difference between baseline and post-retrofit models applied to the same weather year.