IES-VE User Forum

Thanks Joseph. I think my expectation comes from using SAP prior to IES but your comment does make sense. There seems to be a lack of reviews on IES, or did I look in the wrong place? I am currently writing a case report about the energy modelling I did and trying to acess the appropriateness of IES ...

Changing the DHW delivery efficiency does not affect the space heating load. It seems that IES does not make any use of the heat losses of the DHW system. If the storage and pipes are inside the heated space, in Winter this lost heat would contribute to heat the house. Am I right? It seems a really ...

Hi all,

I`ve been struggling with a Heat Recovery Ventilation system. I`ve defined the `Apache Systems` settings like you can see in the attachment and then set 0.48 ac/hr for each room.

I don`t trust in the results achieved in this way, because the heating load doubles from 27kW.h/yr.m2 to 54 ...

Hi all,

I`m quite new with IES and look forward to learn more about it. This is probably very silly detail but:

When I put a roof on the house I`m modelling and start a simulation the following error appears:

"Error: Instability in room ROOF0000. Possible remedies: reduce time step; set control ...