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INDUSTRIAL AIR CURTAINS
Oleg Systems Co. Ltd. is a world's leading
supplier of industrial, commercial and institutional air curtains,
including:
- High velocity industrial air-curtains for
opening heights up to 30 Ft
- High volume laminar tangential air
custains
- Heated (electrical, gas, steam) air
curtains
- Process air knives
- Architectural air-curtains with
attractive appearance
for a number of industries and applications:
- industrial fume control
- shipping gates wind elimination
- shopping malls and institutional
entances
- insect control
- climate zones separation
- local heating and colling
Phone: 1-888-763-1800
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<>Natural ventilation
systems, unlike ordinary methods of ventilation, are independent of
outdoor atmospheric conditions and can, therefore, maintain the indoor
atmosphere at the most healthful temperature and humidity and can free
the air of dust and other undesirable materials. They accomplish this,
however, at a considerable cost in energy.
Variable Air Volume
air handling units have a varying supply air volume and work similar to
the 80/20 design, however, the recirculated air passes through a bypass
section instead of through the facility. This type of unit is used in
applications where building pressurization is desired and where
contaminants located in the space cannot be recirculated. Facilities
that have indoor vehicle operation frequently accumulate carbon
monoxide and associated noxious fumes. For such instances, a
ventilation sequence can be instituted to limit this potentially
harmful buildup. The pressurization units for these buildings could be
fitted with a carbon monoxide detector with an initial setpoint of, for
example, 50 ppm that would trigger an alarm and energize a time-delay
relay. If the condition still exists after, say, five minutes, then the
return air damper would modulate closed and the outside air damper
would modulate to the 100% open position. A second setpoint of 100 ppm
would initiate an alarm and eventually de-energize the burner. The
dampers would then be positioned to enable the exhaust mode. After the
carbon monoxide returns to a safe level, the sensor could reset the
unit to normal operation. In addition to emergency ventilation to purge
carbon monoxide, the pressurization unit can be used to provide a
source of ventilation during warm and hot months of the year. A reverse
acting thermostat would modulate the outside air and return air dampers
to bring in more outside air to maintain the indoor setpoint. These
units can also be fitted with either chilled water or DX cooling coils
to provide tempered or conditioned air to the space during the summer.
Direct-fired pressurization equipment is capable of delivering plenty
of ventilation to a facility when it is configured as the 80/20 system.
Infrared systems, however, may need to be supplemented with a separate
ventilation system. Gas-fired pressurization systems offer good
solutions to heating large structures such as warehouses and
manufacturing facilities. Situations that require significant
ventilation favor pressurization air handlers as do facilities that
generate dust, mists, and other contaminants. Cleaner environments with
less intensive ventilation needs would do well to go with the infrared
radiant heating approach. In very cold climates, it might be beneficial
to go with a hybrid solution using radiant heat at the perimeter as the
primary heating source and placing pressurization units at the center
of the facility for ventilation and for pressurization when doors are
open.
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