In this video, we will discuss the steps needed to prepare and run load calculations in Revit. Finally, we will do a quick comparison of the Revit and OpenStudio load calculations.

Transcript:
The next step is to input some of the parameters for the energy and load calculations.
Go to "analyze", "energy optimization", "energy settings".
For the mode we will just use the default conceptual masses and building elements.
These other two are for legacy Revit models.
Yeah, I do not totally understand it. I think if you also have additional conceptual structures in your Revit model.
We will leave that as default. Ground plane is the basement.
Project phase, new construction. As I said, these settings do not seem to make a difference. Leave those as default.
Go to the advanced, other options. These values here also deal with the conceptual modeling. So, we do not have to worry about those.
Building data; we are modeling a school. Change this to school or university.
Building operating schedule; this is going to be a k-12 school.
The building is just hot water convectors...um...I do not think that that is an option here.
We will select four pipe system. The building does not have cooling. So, we don't have to worry about that.
Outdoor air information; I believe, on average, for this building, the outdoor air was 10 cfm (4.8 l/s) per person.
If you average out the classrooms and the offices and the hallways etc. the area outdoor per area was something like 0.08 cfm per square foot (0.4 l/s per sqm).
These are averages for the entire building. It will change based on the specific space types.
If there are no space types assigned, then it will default to these values.
Click ok.
Export categories; spaces.
Conceptual types; we do not have any conceptual types.
We will be doing schematic types. If we do not override this, it will default to the conceptual types.
We want to override all of these and we need to edit some of these schematic types.
Roof; wood roof with no insulation. Search through this for something similar.
.....let us try "uninsulated"...insulated flat roof.
Exterior walls; they are brick and no insulation.
Find some wall that has similar properties to the one you are
modeling.
Okay. Brick, air, brick, dense plaster on interior.
Interior walls; let's see...plaster board, timber studing, plasterboard. Okay, we could use this one.
Ceilings; this is also plaster. Type in the keyword "plaster". Half inch plaster with tongue and groove boards.
Yeah, works. That is probably good. There is no insulation.
Floors;...this is a wood...two inch wood deck.
Slabs; insulated solid slab
Doors; metal doors
Exterior windows; U=0.48 and SHGC=0.48...we just type in 0.4...
See what we can come up with...
...it is probably...this one...pretty close...
Double glazing, domestic, 0.5 and 0.48, pretty similar.
We do not have to worry about the interior windows or the skylights. Just leave those as they are.
Click that. Done.
Detailed elements; we are not going to worry about that.
If the Revit model has window elements that are assigned u-values and all that stuff you would check that option.
We will click ok. Click ok.
Now, go to the space schedule that we created and start assigning space types.
The first one is a storage room. Click on the space type, edit it.
We can assign this as an inactive storage, here.
You will notice that this inactive storage space type has been assigned warehouse lighting and power occupancy schedules.
We will have to edit those. We want to make these space types the same as our OpenStudio model.
People definition; people definition does not matter for storage areas. We do not have to worry about that.
Sensible and latent heat gains; we do not have people factoring into this space.
So, we should not have to worry about that.
I guess we can just do zero square foot per person since it is an unoccupied storage room...
well...we can just leave that as it is.
Lighting load density; 0.3 watts per square foot.
Let us look at what we had on the energy model. For storage we had 0.2.
Change this to 0.2.
Electrical power; ...these storage rooms...it is probably just the general...maybe this one. 0.2
There is no plenum in this model, so the lighting power will go 100% to the space.
Change this to zero occupancy schedule.
It is going to be a school occupancy. You can customize these if you need to.
You can create a new one or duplicate this one and edit these values here.
Same with the lighting schedule. Go to school lighting power schedule.
We will a new one here. Rename this "storage power". We can edit these to be less.
All right. Assign that storage power schedule.
Outdoor air per person; zero...
It should not calculate people for this space...
I am not sure how that is going to do that, but anyway.
Outdoor air per area; ok.
Outdoor air method;...it is going to be by people and area..
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