Cleanroom Hepa Filters

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Different Types of Cleanroom Airflow System
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Cleanrooms are used for many totally different
processes ranging from the assembly of medicines
to creating microchips. Although the cleanrooms
look similar to normal rooms with features like
walls and doors, they are actually quite
different.
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One of the main differences that set cleanrooms
apart from other rooms has to do with airflow. In
a standard office, HVAC units typically produce
two to ten changes of air per hour. In a
controlled environment like a cleanroom you
expect to see 20 to upwards of 600 air changes
per hour.
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This means much more air is being moved in the
cleanroom which is designed to combat
particulates and contamination. Cleanrooms
require a high volume of air which is usually
pushed through the HEPA, or high efficiency
particle air filters.
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You've probably seen these filters before in your
vacuum or car, and the ones in the cleanroom work
in the same way. HEPA filters are meant to
capture particles before they enter the
cleanroom. For some cleanrooms that require a
very high standard of cleanliness, ULPA filters
which add an enhanced level of air purification.
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The air in the cleanroom passes through the HVAC
and flows down into the cleanroom. There are
several different types of airflow in a
cleanroom, although laminar flow is the most
common. The air flows down from the ceiling in
flat layers.
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From here the air reaches the ground and is then
captured through floor level grilles where the
cycle is started all over again. Some rooms that
have positive or negative pressure may require
additional equipment to add additional clean air
to the cleanroom.
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The surfaces in a cleanroom are quite different
than those found in standard rooms. In an
environment that needs to be cleaned quite
frequently, the surfaces in a cleanroom are
designed not to emit particles, as well as being
easily cleaned. This includes smooth surfaces and
avoiding a design with excessive cracks and
crevices.
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In addition to airflow and easily cleaned
surfaces, cleanrooms may employ specialized
entryways and air showers. Like the air filters,
these are additional means to keep particulates
out of the cleanroom and not contaminate the room.
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Those who work in cleanrooms usually wear some
type of protective clothing that may range from
gloves all the way to a fully protective suit. In
conclusion, cleanrooms are controlled
environments that are continually waging war
against particulates.
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Utopia Specialized HVAC units, HEPA filters and
air showers all help keep the environment clean
and in working order. Utopia-Aire Pte Ltd are in
the business of establishing systems for internal
environment control.
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