Hi @MingboPeng thank you very much for your response and sorry for the delay in the response.
I am trying to model basically Air source heat-pumps in GH using IronBug. I havenot modelled the system in OpenStudio, but i have done it before in designBuilder. Basically it uses an auxillary water loop for heating. You can find more information here: DesignBuilder Help
I also went through the forum and found this relevant post: IronBug Air Source Heat Pump - #22 by Mariafa.
but i cannot find it in my IB installation (its latest)
Please let me know if you want more details from my side on this.
Thank you for your response.
Thanks and regards
kartikay sharma