Feature Requests

Allow fixed pressure drop through ductwork equipment such as attenuators, rather than just k values/ zeta values

Would love to see room transfer ducts for return air

Currently in H2X, there is no pressure drop rate (Pa/m) to show in the result, only pressure drop(Pa) for the whole duct length. We need to calculate them using duct sizer every time.

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

I would like to be able to connect supply air MVHR to an AHU intake to enable the 2 systems to be combined and operate together. The calculation should also be able to complete when they are connected

Currently grilles and diffusers can't be referenced like AHUs. This would assist in providing mark-ups for drafting. This reference should show up instead of the green diffuser text that is currently shown. Maybe these references could be auto populated as they are placed.

As we do a lot of residential schemes, it would be good if there was a library of plastic ductwork and fittings which included sizes 204x60mm and 220x90mm.

Have the ability to select the simi ridged duct sizes for HRV systems, particularly the manifold box connections and fix the sizes so H2x doesn't over ride them - 2 dust into one HRV diffusers would be great also.