CO2 control

The common demand control approach for MVHR systems using one CO2 sensor within the ventilation unit is assessed based on a typical residential apartment situation using CONTAM models. The simulation results confirm that air flow and therefore fan electricity and ventilation losses can be reduced compared to constant flow control, in particular for higher nominal air exchange rates. However, under certain boundary conditions, e.g. unevenly occupied dwellings indoor air quality in certain rooms may suffer with this DCV strategy.  

Nowadays many people spend most of their time indoors, so the quality of indoor air has significantly impacted human health and comfort. The purpose of the present work was to determine the thermal comfort and suitable air intake rate for Thai people in air-conditioned buildings. A field study was conducted in three types of building from six provinces of Thailand; 698 occupants responded to the questionnaire while simultaneous indoor air quality measurements were taken.