IES-VE User Forum

Sorry to be a Johnny-come-lately, but I just have a question for Johnnymac:

Are you sure you need the overhang in the merged room space? If I were to have a room with an exposed pitched roof/ceiling above it, the overhang is normally beyond the line of insulation of the building and is *not* part ...

You should probably read the MacroFlo Calculation Methods manual. IES does calculate buoyancy driven flows, but depends a lot on which type and how your model is setup. What do you mean by internal buoyancy flows, vertical or horizontal flow? Within the same typical height room or within an atrium ...

Regarding VFD fans, all that means to IES is that the efficiencies will be different, so ensure the fan's operating characteristics from an efficiency standpoint are representative. As for control based on static pressure, in ApacheHVAC the fan flowrate is either directly controlled or is controlled ...

I don't really know much about SBEM or EPC, but within your templates manager you can assign a DHW system for each template. What I would do is create the two systems with ONLY the DHW configured and only use it for modelling DHW.

If both systems feed into the same DHW supply, I'd simplify it by ...

I don't think you need training on IES to figure out what to do with stairs, honestly. You just need to figure out just what you hope to get from the simulation and find a reasonable approximation for it. I suppose you intend to calculate heating / cooling loads? I would simply model it as three ...

To my knowledge IES does not adjust for altitude, and assumes a standard air density. ApacheSim Calculation Methods gives a standard density of 1.2 kg/m³, while the MacroFlo Calculation Methods gives a standard density of 1.21 kg/m³. Either way, I'm pretty sure it's constant and you'll need to ...

Hi Phil,

I know you're just the messenger, but here goes.

First, even the newly released major release version 6.2 does not have readily available release notes or new features. Maybe they're somewhere, but they're not on the download page and they're not on the news release. Nor is this the first ...

I want to address this post to IES. It is regarding updated and complete help manuals.

When version 6 was released over a year ago, we were told that manuals would be updated and released shortly afterwards. This has been over a year ago. It might be understandable that when a major release comes ...

Without seeing the model myself, it is somewhat presumptive to state that the solar gain must be higher in summer than in winter and that it must follow the fact that the cooling load is higher in summer than in winter. It is entirely feasible that the solar gain is lower in summer than in winter ...

I think that your error message is because the airflow network does not have sufficient information. I would suggest reading the ApacheHVAC manual, Appendix A "Rules for Air Flow Specification".