REM/Rate™ collects building characteristics and simulation inputs from the user and utilizes OpenStudio-ERI and EnergyPlus to perform the underlying energy modeling calculations. REM/Rate™ does not modify or override the default simulation algorithms, calculation methodologies, or ANSI/ASHRAE 140 testing frameworks provided by these engines.
Compliance with ANSI/ASHRAE Standard 140-2020 (Standard Method of Test for the Evaluation of Building Energy Analysis Computer Programs) is achieved through the use of these underlying simulation engines, both of which have established testing and validation procedures demonstrating conformance with the standard.
EnergyPlus 24.2.0
EnergyPlus is the building energy simulation engine used by OpenStudio-ERI and performs the detailed hourly energy calculations for REM/Rate™ analyses.
EnergyPlus 24.2.0 ANSI/ASHRAE Standard 140 Documentation
OpenStudio-ERI 1.9.4
OpenStudio-ERI serves as the rules engine that translates residential building inputs into a standardized energy model and manages the calculations required for ERI and related residential energy program analyses.
OpenStudio-ERI Testing Framework Documentation
REM/Rate™ relies on OpenStudio-ERI and EnergyPlus for all energy simulation calculations associated with ANSI/ASHRAE Standard 140 validation. By utilizing these engines without modification to their core calculation methodologies, REM/Rate™ inherits the ANSI/ASHRAE 140 compliance demonstrated by the versions of OpenStudio-ERI and EnergyPlus incorporated into the software.