The RTF uses building energy simulation to develop climate zone specific energy savings estimates for both residential and commercial measures. For measures that are weather dependent, the RTF uses a consistent methodology to determine savings across the region given a variety of climates. In 2018, the RTF worked to improve its methodology for selecting representative weather stations for use in these building energy simulations. That updated methodology can be found here.
Below are materials that support the RTF's weather dependent energy savings analyses.