2 - Review the Generated Baseline

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Right here, we have the LEED baseline building that we created in the first video. If we look at the 3D geometry of the building, it looks identical to the initial building. We're just going to go through and carefully look at some of the changes that were applied to this building to make it a 90.1 building.

Again, this is 90.1 2007. However, most of the standards after 90.1 2007 have the same basic structure.

Some of the inputs will change, but the effective backbone, if you will, of this file will remain the same. Let's just start with the modules here. These top buttons are modules as a reminder. We'll start through here and we'll look at some of the changes that were implemented.

Starting with the project and site, we actually checked these values when we created the baseline building from the proposed building, and that should be the same. Let's just look at the building shell, which is where a majority of the changes occurred. If we look at a wall, there's multiple ways to do this in eQUEST, but one of the ways is simply through the component tree. If we look at a wall, the construction is a 90.1

non-residential above ground wall construction. This wall construction should also correspond to the correct climate zone. We'll look at that in a moment. In this wall, there's also some glass types.

The type of glass, again, is from 90.1, and this was created by the eQUEST wizards. Otherwise, you'd have to do this manually. This is a non-residential vertical metal-framed glass type.

We can see on a floor that it also brought in a 90.1 floor construction. This is an exterior floor construction. Walls and windows have a huge impact on the model.

If we look at the constructions, we can see all of these constructions were imported from the compliance wizard. Let's just take a look at one of them, see the above ground construction. From memory, I know that this is correct, 0.065 for the calculated u-value.

It has the absorption that's built into the library. More than that, it has all of the correct layers from the library. The 90.1 walls and roofs, etc.,

they need to be lightweight assemblies for 90.1. If you did this manually, it would be quite a bit of work. You'd have to create these libraries at least once and then import the correct library into each model. That was the wall, the roof is similar, it's going to have a different u-value.

Again from memory, I know that's correct. If we continue to scroll, we can see the individual layers were created that built up the lightweight assemblies. I want to look at the glass. Glass is a bit more confusing in equest.

This brought in the non-residential vertical metal frames glass. We may have to change that when we set up the frame type, but typically most glass is metal frames, at least in buildings I've worked on. We would have to set that up when we set up this in the compliance wizard. I'm not sure the exact library that it would bring in, but we have more on that later.

When you compare these numbers to the ASHRAE values, they might not be exact. The reason is that equest, when it calculates, it adds a layer of error, if I'm not mistaken. These numbers may be different when you look at the computed shading coefficient and glass conductance and so on. Again, that's something that we probably need to talk about later, but right now we can see the glass has been imported.

The next module is internal loads. The typical input here that would be edited for each space based on the building type would be the lights per the occupancy type. If we go to lighting, this is a conglomerate of two types of different rooms that are combined. When we set up lighting in 90.1,

it's almost something that you have to do manually because the lighting changes based on the year. Even if this was accurate for 90.1 2007 and it's not, we would still want to go and change this and we'll have a separate video on editing the lights. If we look here, we can see that this has two occupancy types, office and lobby, and the lights were created as a weighted average of that.

That was just according to eQuest defaults and not necessarily 90.1 defaults. Unfortunately, the lights did not update. It's probably not the worst thing because the lighting power density can be complicated from version to version and also from building type to building type.

For example, multi-family high-rise, you can't always take a lighting credit in the baseline building. The next module is the water side HVAC. This building was 50,000 square feet and therefore it did not have any chillers. However, because it was entered as electric and other, there is a boiler.

The base boiler was brought in and it was brought in with a heating input ratio of 1.253. You have to take the inverse of that. That is about 79% efficient. We can see from the compliance information, the AFUE is 0.79,

the thermal efficiency is 0.8. Again, from memory, I know that's correct from 90.1 2007. You may know more about this based on your specific locale and if you do, that's great on you and you'll know what inputs to change.

In general, this number is accurate. It will change moving forward in other versions of 90.1. We already showed you that the baseline system type changed just as an example so that we could show you that this was in fact a different file. The system setup is arguably the most inputs of any change that you make to a proposed building when turning it into a 90.1

building. In 90.1 2007, there are 8 system types, 1 through 8. In other versions, there is 1 through 10 and I believe there are more in later versions.

The size of this building indicated system 5 and we looked that this was some type of VAV system but we'll note that the type of the VAV system was somewhat unexpected. I have not experimented with this to compare its operation between the typical 90.1 VAV system 5 but that is something that someone could look into. It seems like it's pretty similar when we look at the fan operation and the fan control.

This fan curve has been brought in from the 90.1 fan curve which is defined as a polynomial. We'll look at that in a separate video. You can see the night cycling was set to cycle on any.

It should be cycling when it's not occupied so that's good. A few of the variables to check here. We would want to look at the cooling sizing ratio. In the 90.1,

cooling is oversized by 15%. We can see that is done for heating. Heating is oversized by 25%. We can see that has been done as well.

In the unitary power for cooling, there is a long list of COPs and other mechanical efficiencies that you need to have for a 90.1 baseline building and this is something that you will have to check to verify because it changes based on the size of the equipment and I don't believe that the EQEST compliance rule set can give you a perfectly accurate number. Along those lines, the fan power changes based on the size of the building.