Technical directory · Housing
Bungalow return air
A single-storey layout can still have long branches and return restrictions, especially after basement renovations.
What to observe
Map the affected rooms and accessible return grilles; note when changes began.
A field example
A finished basement may have changed the return path from the original bungalow design. A new wall can hide a return grille or create a restrictive route even if ducts contain little debris.
What the written work should say
A qualified assessment should examine return path and fan operation before attaching a cleaning recommendation.
Where this task stops
Square footage alone cannot predict duct contamination or service price.