I started by determining the elevation of where the HVAC system should be placed (as close to the ceiling as possible to be unobtrusive to the occupants’ space, but lower than the structural system). I also had to account for the width of the ductwork. Thus, I placed the Level 0 air terminals at 8’ and Level 1 terminals at 9’. I placed also the supply air terminals closer to the building envelope (where the temperatures change most).
I also adjusted the CFM for each supply air terminal to better fit the calculated supply airflow values in the space schedule:
Level 0 (West)
- Mechanical Room: 100 CFM
- Museum Displace Room: 500 CFM
- Restroom (20): 100 CFM
- Restroom (19): 100 CFM
- Public Gathering: 2 x 400 CFM
Level 0 (East)
- Conference Room: 2 x 400 CFM
- Cafe: 3 x 500 CFM
- Hallway: 2 x 100 CFM
Level 1 (West)
- Space (10): 250 CFM
- Space (11): 350 CFM
- Restroom (9): 100 CFM
- Restroom (12): 100 CFM
- Office (3): 100 CFM
- Office (2): 100 CFM
- Office (1): 100 CFM
Level 1 (East)
- Hallway: 2 x 250 CFM
- Meeting Room: 2 x 450 CFM
- Public Space: 2 x 500 CFM
The biggest challenges I encountered was figuring out the elevation of the terminals and ducts to not clash with the structural framing as well as an efficient way to layout the pipes to minimize bending. I would suggest incorporating passive heating strategies to lower heating loads, such as placing spaces with a higher heating load to the south side of the building to make use of the solar heat. I would also suggest putting trees and vegetation at locations that get a lot of unwanted heat to minimize cooling loads. The proposed design meets the project’s spatial design goals.