Function Description; General Information On Indoor Air Quality; The Purification Process Described - MANN+HUMMEL OurAir SQ 2500 Originalbetriebsanleitung

Function description

3 FUNCTION DESCRIPTION

3.1 General information on indoor air quality

Fine dust, harmful gases and aerosol-borne pathogens in the air are bad for human health.
We spend more than 90% of our time indoors. The concentration of pollutants such as particulates,
ozone or volatile organic compounds (VOCs) can be five times higher than outdoors.
The quality of our ambient air takes on a special importance in times of virus outbreaks. Simply when
breathing out and speaking, every person distributes thousands of aerosols (tiny saliva particles) in the
ambient air. These particles are invisible to the human eye, under certain conditions they can fly farther
than 1.5 – 2.0 m, and they can even stay airborne for several hours. People with a virus infection spread
the disease in the air they breathe. If other people inhale infectious aerosols, the virus enter the lungs
through the respiratory tract and can lead to an infection. Reducing the concentration of aerosol-borne
pathogens indoors therefore plays an important role in reducing infection rates.
Virus can be transmitted on the air in spaces with an inadequate air exchange. For this reason, regular
ventilation is one of the most effective measures to reduce infection. Regularly exchanging indoor air
with fresh air reduces the concentrations of harmful gases (e.g. the carbon dioxide exhaled by humans)
and, where there are infected people, it reduces the concentration of virus-contaminated aerosols.
However, adequate ventilation is sometimes impossible where windows cannot be opened or are too
small. And all too often, people simply forget to ventilate. It is therefore advisable to support the
exchange of air with professional air filter systems.
This is where the OurAir SQ 2500 indoor air purifier can help you.
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3.2 The purification process described

The MANN+HUMMEL OurAir SQ 2500 is a versatile air-purification system for indoor spaces. It is
equipped with a pre-filter element (ePM1 55%) and a HEPA main filter (H14). These combined filters
reliably capture more than 99.995% of all particles and aerosols in the room air (including particulates,
viruses, bacteria and other micro-organisms). In models with integrated UV-C lamps, the HEPA filter
element is irradiated with UV-C rays at suitable intervals in order to neutralize pathogens such as bacte-
ria and viruses and to inhibit their growth.
The OurAir SQ 2500 is intended for use in rooms of up to 200 m² with an air exchange rate of 5 times
per hour. In rooms that exceed a nominal size of 200 m², we recommend the installation of several
appliances for effective use.
A B C
Fig. 2: Schematic illustration of the purification process
The schematic diagram illustrates the filtering process in your OurAir air purifier:
1. The fan (F) sucks in the contaminated ambient air (A) through the pre-filter element (B).
2. The pre-filter element (B) filters coarser, particulate impurities from the air. Optional is the additional
use of an activated carbon filter element for removal of unpleasant smells and harmful gases.
3. The pre-filtered air (C) reaches the inlet side of the HEPA filter (D), which filters all aerosol-borne
substances from the air including pathogens such as bacteria and viruses to at least 99.995%.
4. In models with integrated UV-C lamps (E*), pathogens deposited on the HEPA filter (D) are reliably
inactivated at regular time intervals.
5. After filtering, the fan (F) directs the air (G) filtered by the OurAir air purifier back into the room.
* Applies to models with integrated UV lamps
Function description
D E* F G
EN – 11