diff --git a/applications/audit_generator/Master Sero Template - Data Extraction.xlsx b/applications/audit_generator/Master Sero Template - Data Extraction.xlsx
index 15bc8d3ab..2416b11f2 100644
Binary files a/applications/audit_generator/Master Sero Template - Data Extraction.xlsx and b/applications/audit_generator/Master Sero Template - Data Extraction.xlsx differ
diff --git a/domain/magicplan/ventilation_audit.py b/domain/magicplan/ventilation_audit.py
index 74fc66e1f..71dc2f0d9 100644
--- a/domain/magicplan/ventilation_audit.py
+++ b/domain/magicplan/ventilation_audit.py
@@ -11,7 +11,7 @@ from domain.magicplan.models import Door, Plan, Room, Window
 
 _DATA_START_ROW = 6
 _MAX_ROWS = 50
-_DOOR_AREA_COL = "U"
+_DOOR_AREA_COL = "T"
 _DOOR_AREA_CF_RANGE = f"{_DOOR_AREA_COL}{_DATA_START_ROW}:{_DOOR_AREA_COL}{_DATA_START_ROW + _MAX_ROWS - 1}"
 _Y_THRESHOLD = 7600
 _DOOR_AREA_HEADER = CellRichText(
@@ -87,16 +87,16 @@ def populate_sheet(sheet: Any, plan: Plan) -> None:
         pct = vent.pct_openable if vent else None
         _write_cell(sheet, row, "L", (pct / 100) if pct is not None else 0)
         # M = formula =I*L — do not write
-        _write_cell(sheet, row, "N", vent.trickle_vent_area_mm2 if vent else 0)
-        _write_cell(sheet, row, "O", vent.num_trickle_vents if vent else 0)
-        # P = formula =N*O — do not write
+        _write_cell(sheet, row, "N", vent.num_trickle_vents if vent else 0)
+        _write_cell(sheet, row, "O", vent.trickle_vent_area_mm2 if vent else 0)
+        # P = unused gap — do not write
 
     for i, (room_name, door) in enumerate(doors):
         row = _DATA_START_ROW + i
         vent = door.ventilation
-        _write_cell(sheet, row, "R", room_name)
-        _write_cell(sheet, row, "S", door.width_mm)
-        _write_cell(sheet, row, "T", vent.undercut_mm if vent else 0)
-        # U = formula =S*T — do not write
+        _write_cell(sheet, row, "Q", room_name)
+        _write_cell(sheet, row, "R", door.width_mm)
+        _write_cell(sheet, row, "S", vent.undercut_mm if vent else 0)
+        # T = formula =R*S — do not write
 
     _apply_column_y_formatting(sheet)