Ability to add MVHR that allows you to input the efficiency without the need to turn on heating/cooling as this isn't required for most MVHR. You can currently do this by using the "percentage of ventilation heat loss recovered" under the calculation method settings but this won't work in projects where you have multiple MVHR or different ventilation system within the project. I have detailed this explanation in my email to Martins (CC Michael and Jordan) dated 10/11/2025