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General
Flanders Alpha 95 Filters are designed for use in
HVAC applications requiring cleaner air than is pos-
sible with ASHRAE - rated filters, but where HEPA
- filtered air is not required. The filters are rated at
95% efficiency on 0.30 micrometer particles by the
DOP test method. The Alpha 95 filter is approxi-
mately 99% efficient by the ASHRAE 52.1 dust spot
test methods. However, it is not rated by these
methods because the standard applies to filters no
greater than 98% efficient.
Alpha 95 Filters are 97% efficient on nebulized
staphylococcus aerosols and are used to remove
biological contaminants. Alpha 95 Filters are identi-
cal in design and construction to the Alpha Cell
HEPA Filters except that the media is 95% efficient
on 0.30 micrometer particles.
Installation Considerations
Alpha 95 Filters should be installed in Flanders leak
tight Alpha HEPA frames or Surelock Side Access
HEPA Housings on the positive-pressure side of the
system fan to prevent air bypass. Sureaire diffuser
sections, air mixing baffles or long transitions
should be used if the bank is close to the fan.
Installation of Flanders 80-85% ASHRAE efficien-
cy prefilters upstream of the fan is recommended to
ensure economical Alpha 95 Filter life.
Standard Alpha 95 Filters have 1.7 times the cfm
capacity of standard Alpha Cell 99.97% DOP HEPA
Filters at the same clean pressure drop. They are
normally rated at 500 fpm so that filter banks with
95% DOP filters can be sized the same as
ASHRAE-rated filter banks.
Typical applications for Alpha 95 Filters include:
• Hospitals
• Biomedical
• Pharmaceutical
• Biotechnology
• Genetic Research
• Universities
• Laboratories
• Food Processing
• Photo Processing
• Semiconductor Fabrication
• Industrial Processing Systems Product
Important Features
• Minimum efficiency is 95% on 0.30 micrometer
particles.
• Manufactured in a variety of wood and metal
frame types.
• Available with a media pack with aluminum sep-
arators or with a separatorless pack.
• Available in a variety of sizes with either a gas-
ket seal or gel seal.
Alpha 95
95% DOP Filter
See component chart on page 79
Flanders - Foremost in Air Filtration
Corporate Headquarters, St. Petersburg, FL
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