What is UVGI?

Ultraviolet germicidal radiation or UVGI is the use of ultraviolet (UV) energy to kill viral, bacterial, and fungal organisms. UVGI fixtures generate UV-C energy with shorter wavelengths than the more penetrating UV-A and UV-B, with less risk to human health. The upper room UVGI refers to the ultraviolet disinfection area located above the room where people live. This method kills airborne pathogens. Fixtures are installed to protect people indoors from direct UV exposure.

Ultraviolet germicidal irradiation (UVGI for short) is ultraviolet light with a UV-C wavelength in the range of 200 to 280 nm, which is known to have a bactericidal effect on living organisms. According to the International Ultraviolet Association (IUVA), UVC lamps have been used for over 40 years to disinfect drinking water, wastewater, air, and surfaces against a variety of human pathogens, molds, fungi, and bacteria.

UVGI disinfection equipment and systems integrate UV lamps with outputs in the UV-C range. Since these types of UV systems are used for disinfection, they are often referred to as UVGI devices.

Guanke the China specialist in high-output ultraviolet germicidal solutions, Guanke ceiling type upper air UV-C ultraviolet

The air disinfection system is installed on the ceiling and can be used for air disinfection in various application scenarios. This product is optimized for low headroom, and UV-C rays are only radiated to equipment height or higher spaces. Specially designed reflectors and blackout louvers control the UV-C radiation

system. Therefore, this disinfection system can continuously disinfect the indoor air without affecting the daily business activities in the space below the equipment.

Advantage

• UV-C ultraviolet rays are only radiated to the height of the equipment or higher, which can sterilize the air without affecting the business activities in the space below the equipment.

• Experiments confirm that UV-C UV light can effectively inactivate pathogens

• No ozone is generated during or after use, environmental protection, and no pollution.

How does upper room UVGI work?

Air flows through the disinfection zone from airflow through the HVAC system, fans, and/or open windows.

Airborne pathogens are killed upon exposure to a certain amount of UV energy. These particles are still in the air, but they are no longer contagious.

NOTE: For airborne viral particles, the upper room UVGI system provides an hourly air change, similar to introducing clean air into the space.

Precautions for using UVGI on the upper air of the room

The most important locations for UVGI are high-risk indoor environments. These include:

Areas with a higher likelihood of illness (e.g. school nurse offices, hospital waiting rooms).

Crowded spaces, especially when the health status of the occupants is unknown (e.g. courtrooms, halls, homeless shelter sleeping areas).

Places where people must remove their masks when eating or drinking (e.g. school cafeterias, dining halls, break rooms).

Areas where it is difficult to maintain a distance of at least 6 feet from others.

UVGI is recommended for use in spaces that do not have adequate or no mechanical HVAC systems, or where adequate natural ventilation cannot be maintained throughout the year. Spaces must be at least 8 feet high, but a ceiling minimum height of 8.5 feet is best with some airflow (such as a low-speed fan) to move the air. Upper room UVGI is not required in open air environments such as outdoor alfresco seating areas.

Although UVGI disinfection has been used for decades, the COVID-19 pandemic has brought renewed interest in the possibility of killing viruses on surfaces and indoor air. Get a better understanding of this anti-coronavirus technology and how UVGI works so you can better understand the right UV disinfection solution for your application.

Where is UVGI used?

The COVID-19 pandemic has increased interest in the use of UVGI to kill the SARS-CoV-2 virus from aerosols on surfaces and indoor air. In fact, both the CDC and OSHA recommend UVGI disinfection, especially for indoor air purification.

Commercial buildings where UVGI surface and air disinfection systems are ideal:

Medical Practices, Assisted Living, and Nursing Facilities

Schools, universities, theatres, and concert halls

Office buildings and manufacturing production facilities, including clean rooms and cold food processing areas

Hotels, restaurants, conference centers, gyms

Public transport such as buses, subways, and trains

Emergency Vehicles and Rescue Equipment