He 2 mau anawaena, 160mm a me 250mm, me 10m ka lōʻihi a hiki ke hoʻopaʻa ʻia i loko o kahi ʻeke no ka mālama maʻalahi.Hoʻololi maʻalahi ʻo Ducting i ka Bersi air scrubber B1000 a me B2000 (kūʻai ʻokoʻa ʻia) i kahi Negative Air Machine me ka maʻalahi a maʻalahi hoʻi.