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This paper reports on the development of an organic air cleaner (OAC), an interior architectural element that optimises plants’ CO 2  absorption in nonventilated air-conditioned rooms.  Sansevieria trifasciata, Dracaena sanderiana, Scindapsus aureus and Syngonium podophyllum  were explored. Two methods were adopted: the plants’ CO 2  uptake was measured, and the results were used for the computer simulation inputs. An OAC works automatically by exposing the plants to indoor or outdoor air when the plants are in, consecutively, CO 2  absorbtion or emission phase. Computer simulations found that the most efficient placement for OACs to absorb CO 2  is to put them far from ACs.

The development of an organic air cleaner (OAC) to reduce CO 2 level of air-conditioned rooms without fresh air supply