Effectiveness of HVAC duct cleaning procedures in improving indoor air quality.

Indoor air quality has become one of the most serious environmental problems because the general people spend about 22 hours indoors indoors a day. The study reported here is to determine the effectiveness of three commercial HVAC (heating, ventilation, and air conditioning) pipeline washing processes in reducing suspended particulate matter and active bioaerosol levels. The three HVAC hygiene processes are (1) contact method (using conventional vacuum to clean the inner tube surface); (2) air sweep method (using compressed air to remove dirt and dirt ) (3) Rotating brush method (rotating) Insert the brush into the piping system and stir and remove the debris. The effectiveness of these sanitary processes is assessed based on the microparticles in the air and the viable bioaerosol concentration in the home. Eight identical houses were selected in the same community. The two families were cleaned using each procedure and the two houses were used as controls. We found that both particle count reading and bioaerosol concentration are higher than before cleaning during cleaning. This indicates that dust, debris and other contaminants may be floating in the air due to interference by the cleaning process. The reading of the number of particles of 0.3 micron size was found to increase by smoking. Due to the cleanliness of the HVAC pipe, the number of particles of 0 micron size decreases. The bioaerosol concentration after the level taken after 2 days of washing was found to be lower than the level before enrichment, which indicates that the washing procedure is somewhat effective. Houses cleaned using the air sweep program showed the greatest reduction in bioaerosol concentration among the three procedures investigated.

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Indoor air quality has become one of the most serious environmental problems because the general people spend about 22 hours indoors indoors a day. The study reported here is to determine the effectiveness of three commercial HVAC (heating, ventilation, and air conditioning) pipeline washing processes in reducing suspended particulate matter and active bioaerosol levels. The three HVAC hygiene processes are (1) contact method (using conventional vacuum to clean the inner tube surface); (2) air sweep method (using compressed air to remove dirt and dirt ) (3) Rotating brush method (rotating) Insert the brush into the piping system and stir and remove the debris. The effectiveness of these sanitary processes is assessed based on the microparticles in the air and the viable bioaerosol concentration in the home. Eight identical houses were selected in the same community. Clean each family with each program and use the two families as controls