COVID-19 Ventilation & Air Filtration

1. What is Covid 19?
Answer: Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.

2. What are the Covid-19 health concerns around aerosol spread?
Answer: Scientists and researchers are continually gathering new evidence about this disease, including routes of transmission. New data suggests that it is possible for COVID-19 to spread through the air among people who are in enclosed, crowded spaces with poor ventilation for a prolonged period of time. Factors contributing to the transmission may include activities that cause heavy breathing, such as singing, dancing or exercise, especially without precautions such as wearing a mask or keeping a physical distance. However, close, person-to-person contact with an infected person before they show symptoms remains the most common method of transmission.

3. Can mechanical air filtration systems make indoor spaces safe from Covid-19?
ANSWER: If you are in a room that can’t get enough outside air for dilution, consider an air cleaner, also commonly called air purifiers. These machines remove particles from the air, usually using a filter made of tightly woven fibers. They can capture particles containing bacteria and viruses and can help reduce disease transmission.

The U.S. Environmental Protection Agency says that air cleaners can do this for the coronavirus, but not all air cleaners are equal. Before you go out and buy one, there are few things to keep in mind.

In light of the WHO's confirmation that there is "emerging evidence" of airborne transmission of Coronavirus Lev-co has put together a series of products that may assist you in designing and procuring solutions that limit the spread of airborne particles such as the coronavirus. In this section you will find equipment that addresses each of these components required in a ventilation system tailored to capture and filter and return air to your facility:

4. What do the health experts say?
ANSWER: the EPA says: " When used properly, air cleaners and HVAC filters can help reduce airborne contaminants including viruses in a building or small space. By itself, air cleaning or filtration is not enough to protect people from exposure to the virus that causes COVID-19. When used along with other best practices recommended by CDC and others, filtration can be part of a plan to reduce the potential for airborne transmission of COVID-19 indoors."

5. How do different systems work and what are the practical and health concerns?
ANSWER: See our list of Control measures listed below, Please note, the practical and health concerns are listed within each CM:

5.5 What are the common components of a Covid-19 Ventilation system
ANSWER: See Below:

  • Supply Air diffusers and/or Nozzles to direct the clean air to the occupant
  • Transport ducts and hoses
  • Powered and non-powered filter housings and air cleaners
  • Electrical controls (VFD and differential Pressure controls
  • Booster fans (Optional)
  • Capture devices

6. In what kind of environments can mechanical air filtration systems be most effective?
ANSWER: the environments that are best suited for mechanical ventilation are:

  • Nursing homes
  • Fitness clubs
  • Restaurants and bars
  • Meeting rooms
  • Lunchrooms and cafeterias

Here is an article from the CDC discussing this further: https://www.cdc.gov/niosh/docs/2003-136/pdfs/2003-136.pdf

What are the pros and cons of Local Exhaust Ventilation versus HVAC solutions? Are there any other possible solutions?
ANSWER: Local Exhaust Ventilation is best suited to the control and filtration of the covid virus because it controls the virus at source and directs the virus aerosol to the filter unit, typically before it can be inhaled by another person where HVAC simply mixes or dilutes the contaminated air allowing other persons to breathe the air in before the air is filtered from the virus.

Here are a few links to articles written about the capture and control of Covid-19 emissions:

Solutions for

COVID-19 Ventilation & Air Filtration

(12-011) Meeting Room, Lunch Room & Coffee Room Ventilation System
Image for Model 963
VBF1- HEPA H14 - ''2-Zone HEPA H14 Defense'' ventilation systems

Stand-alone VBF1 “2-Zone Air Defence” for Coffeerooms, Lunchrooms and Meeting rooms. A simple “Pre-engineered” solution with "Clean-to-less-clean" air distribution, HEPA H14 Filtration (99.995% @ 100 Nanometer), UVC (AKA: UVGI) light, Duct and Diffusion Hood.

The VBF ventilation systems have been designed to control, capture, filter and return contaminated air in various workplaces.

This solution employs the ventilation method of "Clean-to-less-clean" air movement coupled with HEPA filtration as recommended by the CDC, ASHRAE, WHO and more. By using this system you will immediately achieve 99.995% clean Air around the Table and after a short While a 98-99% Reduction of the Virus and Bacteria in the rest of the Room.

NEW GUIDANCE FROM CDC, ASHRAE, AND WHO, REGARDING 'CLEAN-TO-LESS-CLEAN AIR MOVEMENT':

Extracted from ASHRAE's Technical Resources for Healthcare Web Page
Airflow from Clean to Less Clean

By just having a normal conversation, aerosolized virus and bacteria can remain in the air indefinitely, therefore it is important to use forced air to direct these aerosols away from the occupants and allow them to be captured by the HEPA H14 fan/filter unit where the air can be filtered and returned to the space. This limits the transmission of respirable viruses such as Influenza, Coronavirus, common cold, etc. thus substantially reducing the risk of being infected. For example; the zone over and around a 6-person table is approximately 10m3. This gives you a total ACH (Air Changes Per HOUR of 60 VBF1-700 filters.

This solution has a typical payback of 1 year when compared to the costs of 1-week sick leave, per year, per employee.

The systems use a combination of clean-to-less-clean air movement, HEPA Filtration and optional UV light as recommended by both the CDC and ASHRAE. The cleaned air is supplied at a rate of 700 M3/H (400 CFM) or 1000 M3/H (600 CFM) per filter module, directly to the occupants breathing zone. This creates a "Bubble" of constantly filtered clean air around the table and up to 53 air changes in the room.*
Here's how it works:
  • STEP 1: The "Clean-to-less-clean" air movement supplies clean filtered air to the occupants breathing zone through a pre-engineered diffusion hood explicitly designed for the application (EG; meeting room, lunchroom, etc.). This precise air movement is essential as particles of this size can and most often will remain airborne, indefinitely.
  • STEP 2: The ultra-low noise fan draws the air in at floor level where the air is less clean and coolest. The fan is a variable speed centrifugally designed fan that allows you to control the flow
  • STEP 3: The air passes through a silenced chamber engineered to damper the associated noise generated from the movement of air.
  • STEP 4: The Multi-stage filter module filters the contaminated level of 99.995% @ 0.1 Micron (MicroMeters) or 100 NanoMeters NM. Viruses are typically in the Nano particle size. According to the LL University, 'Coronavirus particles are 120 nanometers' in size.
  • STEP 5: The Optional UV light can be purchased to be used as a supplement to help inactivate viruses (EG: SARS-CoV-2) attached to the inner surfaces of the inlet housing.
  • STEP 6: the filtered air is returned to the space through the low-noise smooth duct and on to the Diffuser hood detailed in step 1, thus completing the circuit. This allows the air in a typical room to be changed over 100 times an hour (ACH).
(12-012) Multipurpose Ventilation System (Coffee,- Lunch-, Meeting- and Waiting Rooms, Offices, Schools, Restaurants, Fitnesstudios, Changing rooms, etc.)
Image for Model 964
VBF-Hepa Filter Coronavirus/Air Purifier COVID - H14

Plymoth “VBF- HEPA H14” Professional Airpurifiers.

Professional Airpurifiers for Coffee,- Lunch-, Meeting- and Waiting Rooms, Offices, Schools, Restaurants, Fitnesstudios, Changing rooms …

Plymoth VBF HEPA H14 professional Airpurifiers are used indoors for reducing Corona- and other Virus in the air. They come in two sizes. 700m3/h and 1000m3/h. It is recommended to filter the total air volume in a room 6 times/hour.

For your Safety each HEPA H14 filter is delivered with a Certificate and is leak tested. The efficiency is over 99.995% on particles and Virus which are under/over 0.16 micrometer (down to 0.01 micrometer). The Filters are manufactured in Europe by a HEPA H14 specialist, well known all over the world.

The VBF-HEPA H14-UVC models are equipped with HEPA H14 filter and UVC Lamps.
(12-013) 45 Degree Adjustment Nozzle (1-4) Ventilation System (Coffee-, Lunch- and Meeting rooms, Offices, Waiting rooms, Schools, Restaurants, Fitness studios, Changing Room, etc.)
Image for Model 968
VBF/ADO/Hepa Filter Coronavirus/Air Purifier COVID - H14

Plymoth “VBF/ADO HEPA H14” Professional Airpurifiers.

Adjustable Direction Outlets. 1/2/4 Outlets.

How it works!

Professional Air-purifiers for Coffee-, Lunch- and Meeting rooms, Offices, Waiting rooms, Schools, Restaurants, Fitness studios, Changing Rooms…

Plymoth VBF/ADO HEPA H14 Professional Airpurifiers are used indoors to reduce Corona- and other Virus in the air. They come in two sizes. 700m3/hour and 1000m3/hour maximum airflow. It is recommended to filter the total air volume in a room 6 times/hour. The ADO and H-ADO models are for larger rooms. With ADO (Adjustable Direction Outlet) you can direct the cleaned air in any direction and with up to 4 nozzles. This makes it possible to reduce the overall concentration of Virus and Bacteria in larger rooms faster. The cleaned air is blown out in a controlled direction and is better mixed with the rest of the air in the room. The concentration of Virus and Bacteria in the air which come back to the Filter Unit is higher, which means that more Virus/Bacteria is filtered in a shorter time. The concentration in the room will be reduced faster. VBF-700 is for rooms up to 40m2. VBF-1000 is for rooms up to 60m2.
(12-014) High-Adjustable Direction Outlet (1-4) Ventilation System (Coffee-, Lunch- and Meeting rooms, Offices, Waiting rooms, Schools, Restaurants, Fitness studios, Changing Room, etc.)
Image for Model 970
VBF/H-ADO/Hepa Filter Coronavirus/Air Purifier COVID - H14

Plymoth “VBF/H-ADO HEPA H14” Airpurifiers with Adjustable Direction Outlets.

Professional Airpurifiers for Coffee-, Lunch- and Meeting Rooms, Offices, Waiting Rooms, Schools, Restaurants, Fitnesstudios, Changing Rooms… Adjustable Direction Outlets 1/2/4.

Plymoth VBF/H-ADO HEPA H14 Professional Airpurifiers are used indoors to reduce Corona- and other Virus in the air. They come in two sizes. 700m3/hour and 1000m3/hour maximum airflow. It is recommended to filter the total air volume in a room 6 times/hour. The VBF/H-ADO models are for larger rooms.

With ADO (Adjustable Direction Outlet) you can direct the cleaned air in any direction and with up to 4 nozzles. This makes it possible to reduce the overall concentration of Virus and Bacteria in larger rooms faster. The 99.995% cleaned air is blown out, in a controlled direction, into the area where people inhale. The cleaned air is better mixed with the rest of the air in the room. The concentration of Virus/Bacteria in the air which come back to the Filter Unit is higher, which means that more Virus/Bacteria are filtrated in a shorter time. The Virus and Bacteria in the room will be reduced faster. VBF-700 is for rooms up to 40m2. VBF-1000 is for rooms up to 60m2.
(12-015) Spot Diffusions Arm (1-4) Ventilation System (Coffee-, Lunch- and Meeting rooms, Offices, Waiting rooms, Schools, Restaurants, Fitness studios, Changing Room, etc.)
Image for Model 972
VBF/H-SPOT 2-Zone-Hepa Filter Coronavirus/Air Purifier COVID - H14 Defence with Extraction Arm connection or Chimney Ductwork with Extraction Arm Connection

Unique New Plymoth Product against Virus and Bacteria

Plymoth VBF/H-SPOT “2-Zone HEPA H14 Defence” for Restaurants and Offices. “Plug and Play” product with Filter-Unit and 1-4 flexible Spot Diffusion Arms.

10-times as efficient in cleaning the Air where you want to.

Plymoth VBF/H-SPOT “2-Zone HEPA H14 Defence” filtrates all the air in the room 6 times/hour (Zone-1) and the air over and around the table 30-50 times/hour (Zone-2)! The amount of Virus and Bacteria in the room will decrease with 98-99% after a short time and directly with over 99.995% around the table. A Clean Air Zone is created around the persons who are sitting at the table/tables.

The Spot Diffusion Hood is extremely easy to move to the area where it is needed. You can move it in all directions and up/down and it stays where you put it. With a 2m or 3m Flexible Arm you can reach anywhere inside 2m/3m radius.

By just having a normal conversation aerosolized virus and bacteria remain in the air for long periods. This can transmit severe colds and Corona virus. Plymoth “2-Zone HEPA H14 Defence” reduces that risk. The Zone over and around for example a table is around 5m3. That means that the air is totally changed almost every minute (depending on which VBF/SPOT Filter Unit you choose and how many Spot Diffusion Arms).The risk of being infected by Virus and Bacteria will substantially decrease.
(12-016) Linear Workstation Ventilation System
Unique New Plymoth Product against Virus and Bacteria

Plymoth VBF/SPOT “2-Zone” creates “Clean Air Spaces” where you need them and cleans at the same Time the whole Room.

Complete “Plug and Play” product with Filter Unit and 1-4 Spot Diffusions Arms.

10-times as efficient in cleaning the Air where you want to.

Plymoth VBF/SPOT“ 2-Zone HEPA H14 Defence” filtrates all the air in the room 6 times/hour (Zone-1) and the air over and around the table 50-60 times/hour (Zone-2)! The amount of Virus and Bacteria in the room will decrease with 98-99% after a short time and directly with over 99.995% where you need it. Clean Air Zones are created.

The Spot Diffusion Hood is extremely easy to move to the area where it is needed. You can move it in all directions and up/down and it stays where you put it.

By just having a normal conversation aerosolized virus and bacteria remain in the air for long periods. This can transmit severe colds and Corona virus. Plymoth “2-Zone HEPA H14 Defence” reduces that risk. The Zone over and around for example a table is around 5m3. That means that the air is totally changed almost every minute (depending on which VBF/SPOT Filter Unit you choose and how many Spot Diffusion Arms).The risk of being infected by Virus and Bacteria will substantially decrease.
(12-02) MSF120-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - With Fan (1,000-2,000 CFM)
Image for Model 942
1000 - 2000 CFM Ducted Industrial Air Cleaner that comes standard with (1) 4” deep 30% pleated pre-filter, (1) 65% bag filter, 120ft² of media, and a 2.0 HP TEFC motor 208-230/460/575/3/60Hz. Unit can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-03) MSF240-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - with Fan (2,000-4,000 CFM)
Image for Model 943
2000 – 4000 CFM Ducted Industrial Air Cleaner that comes standard with (2) 4” deep 30% pleated pre-filter, (2) 65% bag filter, 120ft² of media ea. and a 5 HP TEFC motor 208-230/460/575/3/60Hz. Unit can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-04) MSF360-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - With Fan (3,000-6,000 CFM)
Image for Model 944
3000 – 6000 CFM Ducted Industrial Air Cleaner that comes standard with (3) 4” deep 30% pleated pre-filter, (3) 65% bag filter, 96ft² of media each, and a 10 HP TEFC motor 208-230/460/575/3/60Hz. Unit can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-05) MS200-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - No Fan (1,000-2,000 CFM)
Image for Model 946
Blower-less filtration housing designed with up to 4 stages of filtration for industrial applications. Designed to handle airflow between 1000 & 2000 CFM , (multiple units can be combined for greater CFM). Filter system comes standard with (1) 4” deep 30% pleated pre-filter, (1) 65% bag filter, 120ft² of media. System can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-06) MS202-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - No Fan (2,000-4,000 CFM)
Image for Model 947
Blower-less filtration housing designed with up to 4 stages of filtration for industrial applications. Designed to handle airflow between 2000 & 4000 CFM , (multiple units can be combined for greater CFM). Filter system comes standard with (2) 4” deep 30% pleated pre-filter, (2) 65% bag filter, 120ft² of media (per filter). System can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-07) MS203-CV - Dusts, Mists & Gases - Multiple Filter Configurations Available / Washable and/or Disposable Filters - No Fan (3,000-6,000 CFM)
Image for Model 948
Blower-less filtration housing designed with up to 4 stages of filtration for industrial applications. Designed to handle airflow between 3000 & 6000 CFM , (multiple units can be combined for greater CFM). Filter system comes standard with (3) 4” deep 30% pleated pre-filter, (3) 65% bag filter, 120ft² of media (per filter). System can be upgraded with different filter and fan packages to suit a variety of applications and contaminants.
(12-09) BI Direct Drive - Self Cleaning Wheels - Inverter Duty - (1,000 - 21,000 CFM)
Image for Model 950
Direct Drive Fans, Arr. #4 c/w punched flanged outlet and motor. Motors are TEFC E-Pact 230-460V/575-600V/3/60/-3500 RPM. Wheels are heavy gauge, single thickness, self-cleaning wheels, dynamically balanced to ANSI S2.19-1989 specifications for smooth operation. Inlet and supporting bracket accessories are also available.
NB: All Lev-Co BI fans come in a standard configuration of Clockwise rotation / Up-blast discharge. Alternate discharges can be adjusted by the installing contractor.