In-Line, Ducted, Add-On - UVG Irradiation of Air

Refers to the irradiation of the internal space air, by passing it through an In-Line Add-On UVGI system added to the existing (or new) duct run of a ventilation or Air-Conditioning system.

Why? The virus is airborne by attachment.

Dynamic Irradiation of flowing air will Inactivate the viruses by altering their RNA so that they are no longer able to multiply.

How? The air flowing though the In-Line UVGI lamp system will be irradiated and viruses will become inactive.

Action? Install UVGI lamp system to existing duct-work. (needs good design)

Advantages:

• Use during Human Presence.

• Small acquisition cost as most of the fan and filtering system already exists.

• Ability to use existing system.

• Able to treat large quantities of air (in practice limitless) using one AHU.

• Relatively quick installation.

• Does not take up valuable floor area.

Disadvantages:

• Need for precise calculations and design.

• Inherits performance abilities of existing system i.e. if the addition is part of an upper level system its virus control will be the same as an upper level’s system with reduced to zero ability to draw in air from low areas and thus lifting contaminated droplets, especially the larger and heavier ones, into the system to be treated.

• Installation could disrupt business operation for more than one days.

• Could be difficult to maintain due to duct placement.

• Might need adjustments to the existing system’s fan pressure drop in order to compensate for the pressure drop cause by the installation of the system

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