IAQ News

To stop the spread of COVID, many facilities managers use disinfection technology. This includes UV lamps that use ultraviolet germicidal radiation (UVGI) to deactivate pathogens. However, new research shows some of the negative side effects of UV disinfection on IAQ. Side Effects of UV Disinfection on IAQ Hospitals and other healthcare facilities use UV Lamps to disinfect the air as well as high-contact surfaces in buildings. While effective in reducing the spread of viruses, one side effect of UV disinfection is a reduction in indoor air quality. A recent study about the unintended effects of Ultraviolet C Lamps sheds light on the issue. The research focused on a commercial UVC device. The research found that using UV lamps increased the concentration of gases and small particles. The device used in the study focused on a high-intensity device for short durations in unoccupied rooms. However, lower-intensity devices used continuously in occupied rooms also pose a threat to IAQ.  The danger of such UV disinfection side effects is in the inhalation of these tiny particles. When particles enter the ...
Read More

Legionella bacterium is a unicellular microorganism that causes infections and diseases in both humans and animals. In humans, these bacteria cause the pneumonia-type Legionnaires' disease as well as a more mild flu-like illness known as Pontiac fever. This bacteria, and a host of others, give building managers much cause for concern, however, facility Legionella testing helps them keep buildings safe. Understanding the Threat of Legionella Legionnaires' disease affects the respiratory system of those infected with the Legionella bacteria. Before the threat becomes a reality, facility Legionella testing by an accredited environmental lab discovers the bacteria at its source. This includes building water systems such as hot water heaters and tanks, sink faucets, plumbing systems, and cooling towers. A person contracts Legionnaires' illness through contact with water contaminated with the Legionella bacteria. A hot tub, shower, faucet, or even fountains and water features present risk. Additionally, bacteria disperse throughout buildings in the mist produced by cooling towers. The microorganisms spread into the lungs through drinking and the inhalation of minute droplets of water. Mild and Severe Symptoms of ...
Read More

Fouling of evaporator coils occurs for several reasons. Facilities managers, concerned about providing a safe and productive work environment, prevent this through routine HVAC maintenance. For example, air filter replacements and coil cleanings help the system circulate clean air. Before we address the solutions, let’s explore some of the reasons for fouled HVAC coils.  Filter Bypass and Fouled HVAC Coils The main cause of fouled HVAC coils occurs as a result of filter bypass. In this case, tiny particles travel through gaps in the filter. This allows them to enter into the ductwork and then into the place of business. Debris that skips the filtering process can build up and foul the HVAC coils. Therefore, one of the most important considerations in HVAC preventive maintenance is selecting the right filter. Filter bypass also occurs when the AHU cabinet is not sealed properly or has been breached. In addition to providing a healthier work area, reducing filter bypass reduces energy costs as well.  Choosing the Right Filter A higher-rated filter upgrade results in cleaner air. For instance, a ...
Read More

The January 2023 issue of the Healthy Indoors Magazine contains an article on the IICRC’s new mold standard for IAQ professionals. The standard for remediation services serves as a guide to help professionals in their efforts to improve indoor air quality. The information in the standard also benefits facilities managers looking to improve the safety of buildings under their supervision. The following is a summation of the IICRC and its new standard. About the IICRC The IICRC is an organization that develops standards for inspection, cleaning, and restoration industries. With accreditation by the American National Standards Institute (ANSI), the IICRC issues certifications in more than 20 different fields. With approximately 49,000 Certified Technicians and 6,500 Certified Firms throughout 22 countries, the IICRC represents all of the industries it serves. It also works with regional and international trade groups. New Mold Standard for IAQ Professionals When working in residential, commercial, and institutional buildings, the IICRC S520 Standard outlines the steps and measures for mold remediation. A procedure standard for the remediation of mold-damaged structures and contents is ANSI/IICRC ...
Read More

As the HVAC system does its year-round work of providing clean fresh air to buildings, dirt builds up. Not only dirt but particles such as dust and pathogens that cause illness and disease. However, a clean system keeps building occupants healthy. Dirty HVAC ducts could contribute to more serious health problems and pose a threat to those who suffer from respiratory illnesses, autoimmune diseases, or certain environmental allergies. For this reason, commercial HVAC air duct cleaning is critical. Don’t take our word for it, however, NADCA, the leading authority on commercial air duct cleaning, offers detailed information on the benefits of commercial HVAC air duct cleaning. 5 Reasons for Commercial HVAC Air Duct Cleaning Here are five reasons why you should consider commercial HVAC duct cleaning: 1. Improves and Maintains Good Health Indoor air quality (IAQ) is a concern for facilities managers across the country.  The ultimate goal is a healthier indoor environment.  By contrast, poor IAQ is unhealthful and puts people at risk of dangerous respiratory diseases. Along with improving IAQ comes an improvement in the ...
Read More