French translation: murs/parois avec points de reprise d'air placés en bas
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:
murs/parois avec points de reprise d'air placés en bas
Anyway, it means that the return air vents (entrée d'air?) are located near the floor rather than near the ceiling - so it's not "air walls" you're looking for but walls with low level return air grills/vents/ducts