As people spend most of their time indoors, indoor air quality is essential for their health and well-being. To maintain sufficient indoor air quality, we need to ventilate the indoor environment, which requires additional energy. Alternatively, the air can be filtered to reduce the need for ventilation. The development of green living walls and other bio systems in the indoor environment is making the use of indoor air biofiltration possible. We have built a working biofilter prototype and used it to measure the impact of these systems on the indoor air quality. In the controlled volume that we have set up, we were able to measure 13.78% lower concentration of CO2 in conditions with normal indoor air quality, while measurements with a higher starting CO2 concentration showed a reduction by 14.89%. A reduction in the concentration of airborne dust particles was also measured; the PM10 dust particles were reduced by 29.37 %, PM2.5 by 29.37% and PM1 by 33.33%.