O sentido geral é o da tradução proposta. Provavelmente diz respeito a onde ficarão as saídas do sistema de ar-condicionado.

Exemplo: "It was determined that there were an excessive number of air distribution tiles, leading to inadequate subfloor pressure for efficient conditioned air distribution. Severe subfloor obstructions further hindered proper air distribution." em

http://www.wes.net/sunsupport/case_study_4.htm