Using aerosol sealants on air vents can present potential health risks, such as exposure to chemicals, dust particles, and volatile organic compounds (VOCs). These substances can cause irritation to the eyes, nose, throat, and skin, as well as skin allergies and asthma. In addition, people with asthma or allergies may be more sensitive to the vapors released during the sealing process. The parts of a chemical substance per million parts of air (ppm) are measured as PELs.
The effects of these chemicals on the human body are summarized in Table. Some of these chemicals can have short-term and long-term adverse health effects. VOCs are emitted as gases from certain solids or liquids and can be found in thousands of products. The concentrations of many VOCs are consistently higher indoors than outdoors.
At present, not much is known about the health effects that occur due to the levels of organic substances usually found in homes. Poor indoor air quality (IAQ) can cause symptoms such as headaches, fatigue, irritated eyes, and difficulty concentrating. Long-term effects may include asthma and even cancer. Air leaks occur when outside air enters and the air conditioner leaves the house uncontrolled through cracks and openings.
This can result in poor IAQ and moisture problems that affect the health of occupants and the durability of the structure. Sealing cracks and openings reduces drafts and cold spots, improving comfort. The Lawrence Berkeley National Laboratory's Indoor Air Quality Scientific Findings Resource Bank provides more information on VOCs, including current guidelines or recommendations established by various organizations on formaldehyde concentrations. Companies that formulate or use adhesives or sealants must carry out ongoing training programs for all personnel involved in the handling of epoxy materials or for those who may come into contact with them. Aeroseal is a relatively new technology that uses nanoparticles to prevent air from escaping through ducts. This reduces heating and cooling costs, improves durability, increases comfort, and creates a healthier indoor environment.
Single-component systems are generally safer for end users because hazardous chemicals are already partially combined into less toxic blends and because they don't evaporate as easily into the air. Sealing air ducts with Aeroseal prevents contaminants from entering the circulating air. It is important to check the condition of the filters and air flow periodically, as well as the condition of the ducts, motors, belts, etc.