RESTAURANTS

PREPARE TODAY. OPEN TOMORROW.

Aerosols are considered to be the main vector for COVID-19 – especially in the food service industry, where patrons emit particularly large amounts of aerosols when speaking without a face mask. 

Targeted ventilation or air purification help. But until now, there have been no clear guidelines on this situation. And therefore no consideration of your own prevention concepts in politics.

The leading associations in the air conditioning and ventilation industry have now defined clear rules under which ventilation and air purification provide adequate protection against infection. These rules also give policymakers the much-needed tool to avoid blanket closures in the future.  

Association information related to the coronavirus, aerosols and ventilation systems can be found here. 

THIS IS WHAT YOU CAN DO NOW.

Determine the ventilation needs in your restaurant.

Take the recommended action.

Provide evidence of adequate infection control.

 Increase your chance of avoiding closures in the future.

 Increase the attractiveness of your gastronomy for your guests.

WITH THESE 4 NUMBERS, YOU CAN CALCULATE YOUR VENTILATION REQUIREMENTS


1. 

THE FOOTPRINT OF YOUR DINING ROOM

Note the overall area of your dining room. In case of several rooms, perform the calculation per room. Other rooms such as a kitchen or store room are not included in the consideration.

2.

MAXIMUM NUMBER OF PEOPLE

Note the maximum number of people (guests and staff) that can be in your guest room when all available seats are full.

3. 

ACTIVITY FACTOR 1.3

This factor results from the respiratory activity of the people in the room. The stronger the respiratory activity and therefore the aerosol emissions, the higher the activity factor. For restaurants, an increased activity factor of 1.3 applies in principle.

4.

YOUR EXISTING VENTILATION SYSTEM


  • OPTION 1: VOLUME FLOW RATE OF YOUR MECHANICAL VENTILATION SYSTEM

You need this value if you use a mechanical fresh air supply in your dining room. The volume flow rate – i.e., the amount of indoor air that is exchanged per hour – can be found in the operating documents of your ventilation system. Or ask your responsible ventilation contractor.

  • OPTION 2: INFLUENCE OF OPENING WINDOWS

By regularly opening windows, you can reduce the CO2content and therefore also the aerosol concentration in the air. Use a commercially available CO2 traffic light device to measure the concentration of CO2 (ppm) in the air by regularly opening windows. The following reference values will help you with the measurement.

  • The measurement results in a maximum of 1500 ppm CO2content:
    The fresh air supply reduces the required volume flow rate per person to 22 m³/h and the volume flow rate per square meter of surface area to 2.2 m³/h in the calculation.

  • The measurement results in a maximum of 1000 ppm CO2content:
    The fresh air supply reduces the required volume flow rate per person to 11 m³/h and the volume flow rate per square meter of surface area to 1.1 m³/h in the calculation.

 

YOUR FORMULA FOR THE VENTILATION CALCULATION

( People × 36 m³/h +
36 m³/h:
According to EN 16798-1, a volume flow rate of 36 m³/h per person is required to achieve an air quality of class 1 (corresponds to virus-free air).
Floor area × 3,6 m³/hⓘ ) × 
3,6 m³/h:
According to EN 16798-1, 3,6 m³/h per square meter of floor area is required to achieve an air quality of class 1 (corresponds to virus-free air).
1,3   
1,3
The activity factor results from the respiratory activity of the persons in the room. The stronger the respiratory activity and therefore the aerosol emissions, the higher the activity factor. For restaurants, an increased activity factor of 1.3 applies in principle.
=
Required
virus-free airflow*

*The required virus-free airflow must be provided as outside air at a minimum rate of approx. 20 m³/h per person. With a CO2-traffic light device and window ventilation at 1.500 ppm or lower, this is a given. When operating with a mechanical ventilation system, the fresh air volume flow rate per person can be calculated by airflow per person. If the fresh air supply is insufficient, the use of an air purifier is also possible.

YOUR RESULT

WHAT YOUR RESULT MEANS.

The result of your calculation will show you how many cubic meters of virus-free air you need to supply to your room per hour to achieve class 1 air quality (equivalent to virus-free air). 

YOU CAN DEDUCT THE FOLLOWING AMOUNT FROM THE RESULT.

Using a CO2 traffic light device, you can subtract the fresh air component due to window ventilation from this amount. If you use mechanical ventilation, you can also subtract its volume flow rate from the result. The remaining value indicates your additional need for fresh or purified air.

WHAT YOU SHOULD DO NOW.

If your result is equal to or less than zero after deducting the window ventilation and mechanical ventilation, you do not need to take any further action. The indoor air in your dining room is safe even at maximum occupancy. If your result is greater than zero, you should compensate for the remaining value of required virus-free airflow by one of the following measures.

YOUR OPTIONS

CHANGE THE OCCUPATION.

With lower room occupancy, the need for virus-free air in your guest room also decreases.

To achieve virus-free air quality, you can reduce the maximum number of people so that the calculation results in zero.

USE MECHANICAL VENTILATION.

A mechanical ventilation system is a sustainable investment in your indoor air quality. Provided the appropriate output, it enables constant virus-free and fresh indoor air even at maximum occupancy. However, the installation requires major structural interventions. 

If you already use mechanical ventilation, you can increase the volume flow rate if necessary. If this is not possible, you can retrofit a decentralized ventilation unit or use a mobile air purifier to assist. 

USE A MOBILE AIR PURIFIER.

A high-quality air purifier reliably filters viruses out of the indoor air; without any structural intervention.

The device is simple to set up and switch on. In combination with regular window ventilation, air purifiers provide ideal conditions for perfect indoor air quality.

Another tip: depending on the device, there is a large qualitative difference. When purchasing, make sure that your device complies with the requirements of the German Building Climate Association.

TROX AIR PURIFIERS

THE FAST STAND-ALONE SOLUTON TO AEROSOLS CONTAMINATED BY VIRUSES

With the TROX AIR PURIFIER, you reduce the risk of transmission of viruses in insufficiently ventilated rooms to a minimum; without any complex installations. Simply set it up and switch it on.

Safe air distribution

In the TROX AIR PURIFIER, the clean air is vented above head height. This creates a draught. It also prevents viruses from an infected person being distributed directly with the air being discharged in the room.

MINIMum risk of infection

In the TROX AIR PURIFIER, a highly efficient H13-HEPA filter is used here in much the same it way it is used to ensure air cleanliness in operating theatres, for example. This filter has an ideal separation efficiency of 99.95% - even for coronaviruses and their known mutations.

proven safety

The TROX air purifier was tested by a leading independent specialist for qualification and validation of clean room devices and the effectiveness was officially confirmed.

low power consumption

The TROX AIR PURIFIER can be permanently operated without any concerns. Despite its high output, the device consumes less power on average than a 100-watt bulb.

QUIET OPERATION

The TROX AIR PURIFIER is quieter than any comparable device. In normal operation (1000 m³/h air change rate), it is about as quiet as a computer fan making it ideal for use in the classroom.

ALSO SUITABLE FOR LARGE ROOMS

Up to 1600 m³/h air can be filtered by the TROX AIR PURIFIER within an hour.

No other device of this class can do more! This means that a single TROX AIR PURIFIER is sufficient to remove aerosols containing viruses, even from large rooms.

FIND OUT MORE. 


YOU ALSO WANT TO NEUTRALIZE ODORS?

Simply replace the pre-filter with the optional activated carbon filter.

Please feel free to contact us. 

ANY QUESTIONS?

WE WILL GLADLY ADVISE YOU. 

Describe your specific needs to us or arrange a non-binding consultation.

Your TROX AIR PURIFIERS Team

E-Mail: luftreiniger-de@troxgroup.com

Phone: +49 (0) 28 45 202-1080

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.

Contact

We are here for you

Please specify your message and type of request.
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be

Contact

We are here for you

Please specify your message and type of request.
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +32(0)2 522 07 80 | E-mail: info@trox.be