The official tags call the game an air-duct, piping, and HVAC sandbox with air physics. They do not name the part catalog. The part names below come from player comments and from video titles in October 2026. Each entry is also on Fittings.
Names players use
| Name | Where it shows up | What is not known |
|---|---|---|
| One-way transition | A short video is titled as using only a one-way transition. Players treat it as a directional piece. | No official arrow diagram or flow value. |
| Y branch | A viewer asked how to get the Y branch and vaned turns. | No official unlock project. |
| Vaned turns | Asked about in the same comment as the Y branch. Another player said they had them before the new update. | Which update, and whether that still matches the current build. |
| Vaned elbow | A player at project 9 said they still did not have it. | See the conflicting unlock reports below. |
| Pipe | A player said pipes can go over walls. | Placement limits are not published. |
The 13-minute video about setting a transition for an 80 to 100 percent build has a transcript that is mostly lyrics, not a spoken parts lesson. Use it as a look at someone's layout, then test your own joints in game.
One-way transition, in practice
- Get a short straight run to behave the way you want. Steps are in Place ducts with the bottom bar.
- Place the one-way transition in that run. Note which way it faces before you let go.
- Check the result immediately.
- If flow stops on that piece, turn it or place it again. Do not add three more branches first.
- Only then split the route.
A video titled as using only the one-way transition is on Video Guides. Its available transcript is music, so it does not replace the check above.
Unlock reports do not agree
These are comments, not a developer table.
- A player who said they were on project 9 still did not have the vaned elbow. A reply guessed that you have to beat the project.
- The uploader of a Project 1 video later wrote that they got the vaned elbow by joining a multiplayer lobby where that project was already unlocked.
- Another player wrote that you need to join or create a firm and play until project 15, and that you do not need to beat it. They were answering the vaned-elbow question.
- A separate reply about level 5 and level 10 rewards said those rewards come from making your own firm, not from career.
Do not pick one of those sentences and grind toward it as if it were a published rule. The full conflict is in Projects, firm, and career. Creator+ is the only official line about extra objects: it unlocks larger projects, advanced obstacles, and objects in creator mode. That sentence does not name the vaned elbow.