HB Peak Load - Input Rooms?

Hey @chris

I’m trying to understand what kind of input “Rooms” could be fed into the HB Peak Loads component.

If you saw my previous posts on the forum, I’ve been developing a workflow to analyze the peak heat gain in multiple zones on the Summer Design Day.

I’ve used the HB Model to OSM component with custom simulation params to get my results, but I was also trying to check out the HB Peak Loads component, since it gives the “Cooling Balance” result almost instantly, and I wanted to understand how this relates to the surface results I got from the Model to OSM component.

So I tried to plug in the Rooms input (after they’ve been assigned a construction set, room programs, loads, schedules, ideal air system - basically the same “Rooms” input that would go into the HB Model to OSM component) to the Peak Loads component, but if I do that, it throws a “FATAL error”, and it doesn’t run.

Whereas, if I just plug in the raw Rooms with just the apertures on them, it gives me a result.

I’m now trying to understand if the Peak Loads component is just designed for such kinds of VERY early studies to help understand the loads purely because of the geometry and the fenestrations.

Could use some help!


Hi @harishv ,

What is the error that you get and can you share a minimal sample .gh file that recreates the case? At a minimum, I need a screenshot to know what is going on here.

And I wouldn’t necessarily say this:

The Peak Loads component is running an E+ simulation that is optimized for just looking at loads but the transient calculation that E+ runs for this is already much more advanced than the steady state load calculations that most HVAC engineers are using to size HVAC equipment (eg. what you would get from TRANE TRACE or an Excel tool). Sure, the peak loads component is less advanced and less customizable than the run with the OpenStuido component, which will also give you the sizes of each piece of HVAC equipment. But I would not say that it’s exclusively for “VERY early studies.”