Supply fans or "make-up air" units
Supply fans may be either wall mounted or roof mounted. Most American
Coolair fans and PRVs of the type described above are available for
supply usage.
Filtered
Supply PRY -- Type PS-F
Additional modifications and special products are available from
American Coolair to tailor their usage to individual installations.
For example, filters may be added to supply PRVs when desirable.
Also, American Coolair's uniquely designed Model PT Power Tube Fan
can be used to supply make-up air, in summer and winter, without
the need for the supplemental heating required by most other make-up
air systems.
For more information on the application
of this special products refer to American Coolair Form No. 520-15.
Make-up
air unit -- Type PT
Intake louvers
Many
breeze conditioning systems are designed without the use of supply
fans or make-up air units of any
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kind. The exhaust system creates a slight negative pressure in the
building and outside air is induced through openings designed for
this purpose. Intake louvers are usually mounted at the opposite end
of the building from the exhaust fans in suitable wall locations.
When the breeze conditioning system is in use, the louvers are opened
manually or by damper motors; when not in use, the louvers are closed
to provide weather protection. An alternative method for providing
air intake openings is through the use of roof mounted hooded supply
vents. American Coolair's Type PE PRV can be furnished without a fan
for this purpose.
Air
circulators and spot coolers
Mobile Air Circulator
Many buildings
are much too large to rely on the circulation of air at the proper
velocity and direction without the use of supplemental fans. In
other cases, a system of exhaust and supply fans may be lacking
in the building.
Air circulators or booster fans can usually
solve the problem American Coolair customers have used our Type
UD propeller fans (7" to 24") and CABL/CABH propeller fen (24"
to 54" ) to good advantage for this purpose. Pedestal fans
have been used as air circulators in some cases. Spot coolers or
"man coolers" are air circulators used for a specific
purpose or problem area. Air circulators have the big advantage
of being readily available, inexpensive and easy to install. They
are not a satisfactory substitute for a complete ventilation and
cooling system, however.
Baffles,
deflectors and diffusers
In some sophisticated systems, elaborate duct work and diffusers
are incorporated for distribution of air throughout a building.
This type of system is expensive and most American Coolair Breeze
Conditioning Systems avoid this degree of sophistication. Instead,
simple, inexpensive baffles, deflectors and diffusers are used to
good advantage. These items are usually fabricated and. installed
at the job. They are made from a variety of inexpensive materials
including polyethylene, masonite, plywood and sheet metal. Specific
applications of these items will be discussed in subsequent sections.
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