Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
As Scott mentioned, it is planned. OS-HPXML would likely have an additional field for HeatPumpSizingMethodology (and potentially also HeatPumpBackupSizingMethodology), and the methods would be named to distinguish between the two.
HeatPumpSizingMethodology:ACCA vs. HeatPumpSizingMethodology:ACCA2023, or something like that.
See https://openstudio-hpxml.readthedocs.io/en/latest/workflow_inputs.html#hpxml-hvac-sizing-control for what OS-HPXML currently uses.
There are some challenges with implementing N.2.3.4 - Variable Capacity (either Advanced or Dry) because of the "minimum compressor cooling size factor" stipulations. I believe our current OS-HPXML implementation doesn't define this variable, as it is new to ACCA Manual S 2023. We will start by addressing the "Standard Sizing Condition" update for single and 2-speed equipment, which may be just updated oversize/undersize limits.
