I wonder if someone might have a recommendation for the proper method of modeling ‘split’ ductless heat pump units with IronBug? In particular, I am looking at a multi-family building with the following scenario:
- Fresh air is delivered to the hallways, with gas heat (no cooling).
- Heating and Cooling are provided in the residential units with ductless split heat pump systems. This Daikin model in particular: Daikin FXAQ
So I wonder what the recommended modeling strategy for this would be? I wonder if this would fit well with the IronBug ‘Sys16_VRF + DOAS’ template? Or would this be more in line with the ‘Sys4_SZHP’ template? I think maybe I don’t quite understand what systems fall within the ‘VRF’ category?
It seems to me that it’s more a ‘Sys16’ since the ductless units do not have any outdoor air themselves and instead rely on the DOAS for all the fresh-air supply to the zone? But I wonder if that seems right? If anyone knows of any good resources to learn about the differences / boundaries / definitions of those HVAC Systems I’d very much appreciate it.
My thought was to split up the ‘Sys16’ template and apply only the VRF to the resi-zones, then only the DOAS to the hallway zones. So something like:
But I wonder if that seems right? Any thoughts on the appropriate way to approach the above system would be much appreciated!
thanks so much
(btw: IronBug is just incredible - really can’t say that enough!)