Hi @mingbo I’m making a script for a development project investigating the relationships between embodied carbon and operational energy in MEP systems. I’m trying to set up an MVHR system with a summer bypass in Ironbug. I can see in the ZoneERV description that an optional controller can be added…

Hi @anjaligokal thanks for your post. The current version of the Ironbug doesn’t support the ZoneHVACEnergyRecoveryVentilatorController, but I have pushed a new update, and the new installer should be ready in an hour here: Releases · MingboPeng/Ironbug · GitHub Note: you will need to install the …

Hi @mingbo Thanks for the earlier response — really appreciate it. For context I’m modelling a typical UK residential apartment MVHR system. The intended behaviour is: Winter: background ventilation flow rate Summer: boosted flow rate (to help with overheating) I want to drive this seasonal cha…

Hi @anjaligokal , [image] anjaligokal: In this AirLoop-based setup, which input actually drives OA flow so that the fan responds? The main factor driving the OA flow is the ventilation requirement from the zones, and you saw the relationship after you changed the ventilation rate (flow per p…

Now I am thinking why do you need to use the Ironbug, since all you need is a fan for outdoor ventilation. You can just use these two components to set up the correct ventilation requirements based on your needs, and a fan that lets outdoor air in. [image] Use the “flow per person” for all year …

Hi @anjaligokal , ICYMI, here is a similar discussion for modeling MVHR with Ironbug. [image] Modelling MVHR in Honeybee Energy Model Rhino Plugin Hi @milog , I’ll admit that I don’t really understand what you or the manufacturer mean when you say that it does…

Hi both @mingbo @mostapha , Many thanks for your help, I ended up sticking with the ZoneERV component to model the MVHR system. I added two components and turned the availability schedule on/off depending on the season and setting a maximum flow rate to model the winter/summer ventilation rate respe…

Ironbug - Adding outdoor air controller to ZoneERV component

Grasshopper Plugin

mostapha (Mostapha) August 25, 2026, 9:25pm 7

Hi @anjaligokal, ICYMI, here is a similar discussion for modeling MVHR with Ironbug.