Honeywell Shares Tips to Help Keep Indoor Air Safer When Outdoor Air Quality Reaches Harmful Levels

ATLANTA, July 20, 2023 – Honeywell (NASDAQ: HON) today released strategies to keep indoor air quality (IAQ) in buildings safer when the outdoor air index reaches unhealthy levels. According to the EPAⁱ, exposure to fine particle pollution can cause respiratory and cardiovascular health issues.

Recent outdoor air pollution events, including wildfire smoke, are prompting health officials to advise staying indoors. However, indoor air pollutants can be two to five times worse than outdoor airⁱⁱ, which is often offset by bringing in outdoor air. When fresh outdoor air ventilation is not available to improve indoor air quality, building owners should take extra precautions.

“When the outdoor air index reaches unhealthy levels, it is advisable to avoid introducing external air indoors. The main concern then becomes ensuring the maintenance of healthy indoor air when the option to bring in fresh air is not available,” said Manish Sharma, vice president and chief product officer of Honeywell Connected Buildings. “To promote better air quality in situations like these, buildings should consider utilizing automated and sophisticated sensing, filtration, air purification and air circulation solutions. The question then arises: how many buildings can presently claim to possess such important capabilities? At times like this, intelligent and advanced technology becomes critical.”

Honeywell shares these tips for how to keep IAQ safer for occupants:

Tip #1: Continually assess and communicate IAQ

Building owners should utilize IAQ sensors to monitor CO2, TVOC, temperature, relative humidity and PM2.5ⁱⁱⁱ, an extremely dangerous, fine particulate matter that can travel deeply into the respiratory tract. Sensors help analyze data, track trends and alert building managers when indoor air is not safe.

Once a baseline for a building’s health is established, facility managers can integrate their building’s heating, ventilation and air-conditioning (HVAC) system with the IAQ sensors to continually monitor air quality, detect contaminants and clean the air automatically.

Building owners should also consider communicating to occupants the building’s IAQ levels. According to the 2023 Honeywell Healthy Buildings Survey^iv data, 82% of office workers want to be informed about their building’s IAQ often or sometimes.

Tip #2: Rethink Ventilation

Ventilation is an important factor in maintaining healthy IAQ levels and thermal comfort as it freshens up the air inside buildings and dilutes the concentration of harmful particles. While the simplest, cheapest and most traditional way to improve ventilation is to open a window, that is not always a viable option, especially if the air outside is more polluted than that inside.

To keep air clean, building owners can use mechanical ventilation devices, such as fans that vent to the outdoors or portable air cleaners, which may be particularly helpful when ventilation with outdoor, polluted air is not possible without compromising indoor comfort or health. Buildings can also tap into the building’s HVAC system to help maintain safer IAQ levels through adequate ventilation.

Tip #3: Improve Filtration and Purification

One of the most effective ways to improve IAQ is to clean existing indoor air, especially when outdoor air ventilation is limited. Building owners can utilize filtration and purification technologies to eliminate the contaminants from a building’s air supply. For example, HEPA, or high efficiency particulate air, filters can capture particulates of 0.01 micron and greater^v with an extraordinary efficiency by diffusion and interception mechanisms.

Pressurization technologies control the movement of air contaminants within a building and lead to improved IAQ. Control of air pressure, both positive and negative, inside a building is key to providing comfort and preventing outdoor contaminants from entering a space. A slight positive pressure will prevent hot outside air from penetrating into the building during the summer, and negative pressure during the winter can maintain humidity by allowing outside air into the building.

Honeywell Healthy Buildings solutions integrate air quality, safety and security technologies along with advanced analytics to improve IAQ while meeting energy efficiency goals. Our suite of ready-now healthy and sustainable building solutions can help create an optimal indoor environment.

For more information on air quality and Honeywell Healthy Buildings solutions:

• Anatomy of a Healthy Building
• 2023 Healthy Building Occupant Survey Report

About Honeywell

Honeywell (www.honeywell.com/us/en) delivers industry specific solutions that include aerospace products and services; control technologies for buildings and industry; and performance materials globally. Our technologies help aircraft, buildings, manufacturing plants, supply chains, and workers become more connected to make our world smarter, safer, and more sustainable. For more news and information on Honeywell, please visit www.honeywell.com/us/en/news.

_{ⁱ U.S. Environmental Protection Agency, Air Pollution and Cardiovascular Disease Basics [Accessed July 10, 2023]}

_{ⁱⁱ U.S. Environmental Protection Agency, Why Indoor Air Quality is Important to Schools [Accessed July 10, 2023]}

_{ⁱⁱⁱ U.S. Environmental Protection Agency, Particulate Matter (PM) Basics [Accessed July 10, 2023]}

_{^iv Honeywell, Honeywell Survey Reveals Increased Expectations For Healthier Workplaces, February 22, 2023 [Accessed July 10, 2023]}

_{^v U.S. Environmental Protection Agency, What is a HEPA filter? [Accessed July 10, 2023]}