ASHRAE 90.1-2013 addendum cd adds tables 6.8.1-14 and -15 which include an ISMRE requirement for "electrically operated DX-DOAS units, single package and remote condenser."

ISMRE is now also required by IECC 2021.

ISMRE stands for "Integrated Seasonal Moisture Removal Efficiency" and is measured in pounds of water removed per kWh of electrical energy consumed (lb/kWh).

TRANE has a great article on ISMRE and why it's now included in ASHRAE 90.1.

Currently, I'm working on an energy model with a parametric run for a DOAS unit with an ISMRE that is better than baseline, and an EER that is worse than the baseline.

How can I accurately model this improvement in ISMRE, and the resulting reduction in energy usage for the DOAS units?