ASHRAE 241, a new standard published in June 2023, was developed as an extension of ASHRAE’s epidemic task force in response to a request from the White House. It is the latest code for “Control of Infectious Aerosols.” Also referred to as the Indoor Quality Standard, ASHRAE Standard 241 focuses on rolling out guidelines for improved indoor air quality. The primary goal of the standard is to maintain improved air quality in domestic and commercial settings and mitigate health-related risks due to poor indoor air quality. The guidelines mention minimum requirements that aim to minimize the transmission of viruses due to exposure to contagious aerosols in different types of buildings. The new code sheds light on the importance of using efficient and high-performance air filtration systems for adequate ventilation.
What are ASHRAE and ASHRAE standards?
Founded in 1894, ASHRAE is a global organization working for human well-being with the help of sustainable technology. The focus of the organizational members is developing energy-efficient solutions, improving indoor air quality and building sustainability within the industry. A merger between the American Society of Heating and Air-Conditioning Engineers (ASHAE) and the American Society of Refrigerating Engineers (ASRE) formed the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).
Technical committees and organizational members (engineers, architects and mechanical contractors) formed ASHRAE standards for the industry. To stay up-to-date, the organizational members review and update standards every five years. The standards highlight the following key aspects:
- Adequate ventilation levels for improved indoor air quality,
- Building energy standards,
- Construction of green buildings
- Energy efficiency in buildings
Overall, the purpose of ASHRAE standards is to strive for efficient buildings. Experts have compiled the guidelines that comprise several considerations relating to indoor air quality, system performance and energy conservation. These standards promote eco-friendly building designs and construction techniques, ensuring that the construction provides a comfortable, healthy and safe environment to its occupants.
What are Infectious Aerosols?
According to the definition by ASHRAE, infectious aerosols are “pathogen-laden”, microscopic particles released by an infected person when they breathe, talk, cough, or sneeze. These particles are small and can hang in the air for extended hours. When inhaled, they can lead to several respiratory diseases, including SARS-COV2, influenza and tuberculosis.
Key Aspects of ASHRAE 241
Standard 241 originated during the times of COVID-19 when experts realized that ventilation standards in non-healthcare spaces were inadequate to eliminate the transmission risk of the widespread airborne infection. The pandemic sparked waves of concern regarding inadequate ventilation measures in our buildings and no actions within organizations to upgrade their systems for the health and safety of their employees.
To address the gap, ASHRAE rolled out its 241 standard guidelines, with goals to achieve equivalent airflow for better indoor air quality. These rates were higher than the recommendations from other organizations during COVID-19. Following are the key components of ASHRAE 241:
- Infection risk management: HVAC systems usage plan to prevent the risk of infection transmission
- Indoor air quality management: Standard air cleanliness levels for better health and well-being
- Air filtration technology deployment: Tools and equipment for better indoor air filtration
- Outdoor ventilation upgrade: Exchange with fresh outdoor air to dilute the concentration of indoor air pollutants
What are the Benefits?
Better Ventilation:
One of the benefits of ASHRAE 241 is enhanced outdoor ventilation standards. As mentioned, the organization pointed out the gap relating to inadequate outdoor ventilation. Standard 241 came out with target equivalent clean airflow rates as per human density and the requirement of outdoor air intake to improve ventilation. Before the guidelines rolled out, ASHRAE 62.1 was used as a standard to determine ventilation rates. However, 241 recommends airflow rates significantly higher than 62.1.
Energy Efficiency:
ASHRAE 241 also plays a fundamental role in energy conservation efforts. It promotes the adoption of air filtration systems, such as Euromate’s range of air purification systems, for smarter ventilation methods, which results in energy efficiency and better indoor air quality. This benefit is in alignment with environment-friendly building management and reduces the impact of building operations on the environment.
Better HVAC Equipment Management:
Regular HVAC maintenance is a key step in ensuring good indoor air quality. The standard involves instructions for inspecting and cleaning HVAC system components to prevent the transmission of infectious diseases. For example, the guidelines require checking of HVAC systems every three months.
ASHRAE 241 is a significant step in improving ventilation and indoor air quality standards. It identifies the gaps in our existing ventilation standards and introduces new guidelines for better building management, energy conservation and cost savings. The deployment of air filtration technology is a crucial strategy for improving indoor air quality. Euromate Pure Air has a range of air purifying methods that apply to domestic and commercial settings. For more information, contact us here.