HVAC System Recommendations

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Created
Mar 3, 2023 5:29 AM
Created by
Zuping Meng
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  1. At the beginning, I start by explore the available space for my ducts, and think about my layout. I check the coordination of my structural and architectural model first to figure out the upper bound of my duct system:
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According to the dimension above, the maximum height for the HVAC dusts is 10’ 2 3/16”. I would take 10’ as the maximum height for the ducts, since 2 3/16” is enough for the space between the beams and the ducts. For the second floor, I would change it to 11’ for more available space.

As for the duct layout, I think it would be efficient if there is one center line, and the location of the duct should be at the edge for aesthetic purpose.

  1. Check the mechanical room for accuracy:

a. 1.Most of the spaces are fully enclosed except for some space like the dining. Their upper boundary is the upper floor, and the lower boundary is the lower floor. 2. The space type for each space is almost correct. One part that I am not sure is space10 and 11, which are set as Conference Meeting rooms.

b. There are two zones in the building: the West zone and the East zone. From my own perspective, these zones are not properly assigned. They should be assigned base on their functions, instead of their locations.

  1. Most of the spaces have proper assumed number of people, except for the cafe. Even if the cafe area is pretty big, 86.8 peaple are still too much as an assumption. I change it to 45 people instead.
  2. The mechanical model is built, and all ducts and diffusers are applied.

i. The supply diffusers are 8’ above the floor.

ii. The number of the diffusers are calculated, and the capbility of each diffuser is modified base on the air flow required.

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The is my space schedule, but I am confused why the actual supply airflow is 0 except for the space17. The capacoty of each diffuser is adjusted to the appropriate value as multiple of 50 CFM.

I checked the upper level of the space and the location of the diffuser, but they are all set properly.

The ducts are rectangular, and they are a little bit above the diffusers(vary according to their dimensions). Most of the size are determined by the Duct Sizing Tool.

The following shows the overview of the HVAC system:

First floor plan view:

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Second Floor plan view:

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3D view:

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  1. Use the ACC Model Coordination tool to view the merged/integrated models:
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Mechanical Room:

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