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Save heating costs and minimize COVID infection risk at the same time

Save heating costs with QooXoo air purifiers and minimize the risk of infection at the same time? How does that work? 

The currently rising energy costs require special measures from us and also the next Corona waves pose further great challenges for us and our companies, schools, kindergartens, medical practices and stores. Frequent ventilation by opening the windows, 2 to 3 times per hour, to avoid the risk of infection, e.g. with COVID, is therefore, as shown above, in contradiction to the desired energy saving.  

We have taken a closer look at the contradiction for rooms where several people gather, both for rooms ventilated via windows, which is the only option in old buildings, and for rooms supplied with fresh air via a central ventilation system with heat recovery.

Translated with www.DeepL.com/Translator (free version)


Let’s take the example of window ventilation:

Three requirements must be considered:

  • Requirement: Minimization of the risk of infection. In order to avoid the risk of infection with viruses such as SARS-CoV2 and mutations, in addition to a minimum distance between people (min. 1m) in a room, a frequent exchange of air of about 3-4 times per hour, depending on the number of people, is recommended. A directed air movement, which however must not be felt disturbingly as a draught, avoids the spread of a virus cloud with a high virus concentration, which forms around an infected person. The concentration of viruses plays a significant role in infection. A targeted air flow for rapid removal of the viruses minimizes the concentration of a “virus cloud” and thus the risk of infection.

Take a look at the template at https://www.bgn.de/lueftungsrechner.
You will be surprised how often you should air the room with several people in order to reduce the risk of infection. 

  • Requirement: tempering of the interior to a comfortable temperature of 20°.

    At outdoor temperatures around 0 ° C, we will freeze quite quickly when ventilating. The temperature in the room drops very quickly. However, airing is absolutely necessary. Why? Depending on the number of people in the room, the CO2 content increases and leads to fatigue, lack of concentration, headaches and other symptoms. The limit value for CO2 concentration is 1000ppm. In a 100m² room with 20 people, this value is reached after just under an hour. So ventilation of the rooms is necessary, also to regulate the CO2 concentration and humidity in the room. Humidity depends very much on outdoor conditions; if it is very cold outside, humidity tends to be low. 

    Requirement: save on heating costs by reducing heat loss.

    Closed windows and doors keep heat loss low. The reheating of incoming cool outside air is minimized, only leaks at the windows determine the energy consumption. Ideal for empty rooms without people. Not the solution for rooms with many people who want to breathe virus-free fresh air. 

How much energy do I need to reheat after ventilation? An example: Our 100m² room should be warmed up to a temperature of 20°C again. The outdoor temperature is 0°C and after 5min of airing the indoor temperature has dropped by 15°C. To warm up this air again to 20°C you need an energy of about 1,5kWh. If you ventilate 3 times in one hour to minimize the COVID infection risk, this would be 4.5kWh and for an 8-hour day about 36kWh. Compared to airing once an hour, this means 24kWh more in this example.  

Summary: In order to ensure the air exchange that minimizes the risk of infection, you have to use 24kWh more energy per day in the above example than is necessary to maintain the CO2 values. Waste of energy because of COVID? By the way, in one heating period this would be between €1200,- and €1500,- additional heating costs. 


How do QooXoo air purifiers help save energy and keep heating costs to a minimum? 

By using our anti-virus air purifiers you achieve the optimum in heating costs. 

The principle is simple: Through a targeted airflow in the room and a very high air purification rate of up to 800m³/h, the air is continuously cleaned of viruses, bacteria, unpleasant odors, spores, dust and toxins, without energy loss. Fresh air from outside is only needed as much as required for a healthy CO2 balance.  

Simply put: 

Significantly reduce ventilation, save heating costs and reliably maintain healthy air via our economical air purifiers. 

Our QXPure air purifiers reliably destroy all viruses and bacteria through copper/silver additives in the high-quality HEPA filter and the whole thing without ozone and without UV!  

Also in interaction with modern ventilation systems (with heat recirculation), which provide for the necessary air exchange and CO2 compensation instead of window ventilation, a significant heating cost saving can be achieved via our air cleaners with a tripling of the air exchange rate to minimize the risk of infection (COVID, etc.).  

Ventilation systems provide rooms with fresh air and keep CO2 levels below a recommended limit of 1000ppm.

To minimize the risk of infection, the air exchange rate of ventilation systems is usually too low

Ventilation systems replace window ventilation, through which a lot of energy is lost.

With ventilation systems, the tighter the windows, the better!

Heat losses are minimized via the heat exchanger in the ventilation system. Nevertheless, about 30% of the energy is lost and must be compensated by reheating.

The higher the air exchange rate of the central ventilation system, the higher the losses.

However, a high air exchange rate is desirable to minimize the risk of infection in rooms with several people.

Ventilation systems do not destroy viruses.

The costs caused by downtime due to viral illnesses or colds have not yet been taken into account in our calculations and make the balance even more positive. 

QooXoo offers you an individual calculation for your company or organization to determine the savings in concrete terms.  


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