After partition works, one office stayed warm: supply path blocked
The complaint started after partition works. That made the office layout part of the diagnosis, not just the aircon equipment. A layout change can make a working system look underpowered when a newly enclosed pocket of space is no longer connected to the designed airflow path.
By Team Snowflake | Reviewed 14 Jun 2026
Case summary
Daikin Ducted5 years oldOfficeOrchard, Singapore
- Concern
- Client worried the system was undersized for the new room.
- Previous advice
- Client expected a gas check because the new room was warm
- Found
- Partition works blocked the cold-air supply path into one room
- Key check
- Compared the new room layout against the original grille and return-air positions
- Result
- After airflow routing was corrected, the room cooled in line with the rest of the office. Once the air route was corrected, the system behaved consistently across the office. That confirmed the equipment was not undersized for the original zone; the layout had changed the load path. The client could then brief the fit-out contractor with a specific airflow issue instead of a vague comfort complaint.
What we were told
After a new glass partition was installed, one office stayed warm while the open area outside cooled normally.
What we checked
We compared the old and new airflow route. The aircon system was serving the area, but the new room was cut off from the original supply pattern. We looked at both supply and return, not just whether cold air existed somewhere nearby. A room needs air entering and air leaving; if either path is blocked, the room can stay warm. The partition date mattered because the complaint began after layout changes, not after a sudden aircon failure.
Main office area cooled normally.
New partitioned room had weak supply airflow.
The supply grille sat outside the new room boundary.
Return-air path was also restricted by the new layout.
What we found
The partition changed how air moved through the office. Cold air was still being produced, but it no longer entered the enclosed room properly, and warm air inside the room had no clear return path. The partition turned part of an open-plan cooling zone into a separate room without giving that room its own supply and return path. Cold air stayed outside the new boundary, while warm air inside had no easy way back to the unit. That created a room comfort problem from a building change, even though the aircon serving the surrounding area was still functioning. The fault followed the new room shape, so the layout had to be treated as part of the diagnosis.
What fixed it
We advised adjusting grille placement and return-air access before considering equipment changes. The aircon was not proven weak; the air path had been changed by the fit-out. We framed it as a fit-out correction because replacing or topping up the aircon would not move air through glass. The practical fix was to restore the route with grille changes, transfer air, or balancing work. Only after the room had a proper air path would it make sense to judge whether the system capacity was still enough.
Outcome
After airflow routing was corrected, the room cooled in line with the rest of the office. Once the air route was corrected, the system behaved consistently across the office. That confirmed the equipment was not undersized for the original zone; the layout had changed the load path. The client could then brief the fit-out contractor with a specific airflow issue instead of a vague comfort complaint.
What this case teaches us
Post-work faults need the layout checked
- When a room changes after renovation, check the airflow route before judging equipment capacity. A newly warm office room after partition works should be checked as an airflow-design issue first.
- Partitions can separate a room from the supply or return path. Supply and return both matter. A room can have cold air nearby and still fail if air cannot circulate through it.
- The fix may be grille relocation or balancing, not gas top-up. Send photos of the partition line, grille position, and door gap so we can understand the new air path.
Related reading
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