People today spend 80% of their time indoors and have been showing keen interests in air quality since 2015 due to harmful chemical issues such as humidifier disinfectants. Although plant-based air purification method is widely known to the public, its objective performance and air-conditioning efficiency have been limited. In particular, in the case of publicly used places frequented by many and unspecified persons, high air-conditioning wind volume is required and it is difficult to secure the required total wind volume with the current air purification method using plants. Therefore, in order to secure air-conditioning wind volume when linked with plants, this study aims to verify stability in using vegetation units that can be linked with building air-conditioning equipment. To this end, vegetation units and AHU were linked for 40 hours under no irrigation conditions and ecological environmental changes were monitored objectively. Pressure loss by total wind volume of vegetation units was verified, and soil moisture, Chlorophyll, and FVC were monitored. First, soil moisture was converged to 0% at a spot where wind volume is concentrated in vegetation units. In both of two types of tree species, chlorophyll showed a change of 1.2 - 2.9 SPAD and FVC showed a change of 4-29% after the experiment.

Introduction
 Theoretical Discussion
  Quantification of vegetation cover
  Standards for bio-filter performance tests
  Types of vegetation bio-filter systems
 Materials and Methods
  Test procedure
  Establishment of test infrastructure
  Monitoring design
  Modeling of test sample
  Test design and methods
  Determination of standard total air volume and pressure loss conditions
 Results and Discussion
  Analysis of the stability of plant growth: Soil moisture
  Analysis of the stability of plant growth: FVC
  Analysis of the stability of plant growth: Chlorophyll
 Conclusions
 References

• Tae-Han Kim(Department of Environmental Landscape Architecture, Sangmyung University) Corresponding author
• Sung-Eun Park(College of General Studies, Sangmyung University)
• Kwang-Jin Kim(Department Urban Agriculture Research Division, National Institute of Horticultural & Herbal Science, RDA)