DELTRI+ POWERED BY BROCHURE2021 08 31

systemair 7
Will DELTRI+ allow us to reactivate recirculation functions in our AHUs?
How long does a DELTRI+ lter last?
Third-party tests at LIST have shown that the lters
should last over a commonly recommended lter life cycle
prescribed by trusted manufacturers suitable for your
type of application and environment, but not longer than
one year. We generally recommend shorter replacement
cycles – independent from the lter solution.
Is this lter effective against COVID19?
Does this solution support us in tackling the potential impact of
leakages in heat exchangers?
In many COVID19 recommendations, including Systemair’s,
it is recommended to turn off recirculation functions in
AHUs and switch to 100% fresh air supply mode.
Recirculation was utilised in many situations before the
pandemic to save energy (e.g., during a low occupancy at
night in a building or when CO2 levels in a room are low).
In an intelligent ventilation system, this was “normal” and
made sense.
Many building operators and owners have contacted
us over the past months as they would like to activate
recirculation functions again. First, however, they would
like to have the condence to do so.
DELTRI+ is a straightforward solution in this respect.
While high-quality ePM1 lters already help, the DELTRI+
technology offers an additional safety net, which can
enable (partial) recirculation again to save energy.
As tested by the Luxembourg Institute of Science and
Technology, DELTRI+ Technology signicantly reduces
biological aerosols including SARS-CoV-2. However,
the technology’s reliability ultimately depends on
how well you generally maintain your units. It is also
not a substitute for recommended COVID19 prevention
measures in your markets, such as wearing masks,
increasing ventilation rates, and the like.
As conrmed by respected organisations such as ASHRAE or
REHVA, an inevitable leakage occurs with rotary and plate
heat exchangers. However, in well maintained, designed
and operated air handling units by trusted manufacturers,
leakage impacts tend to be minimal. Furthermore, in
rotors, purge sectors can further minimise leakages.
To date, there is no scientic evidence that SARS-CoV-2
can reach an air handling unit. However, if this was to occur,
quality ltration is vital. DELTRI+ can play an important
role here. It goes beyond the commonly recommended
ISO16890 rated ePM1 lters by providing an additional
layer of security and thus peace of mind for your clients.