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Air Filtration – An Energy Conservation Measure
Cleaning Air, Saving Energy, Cutting Maintenance, and Operating Costs
What’s in the air?
<1µm Particulate
• Gas Phase: CO2, CO, VOC’s,
etc.
• Biological: molds, viruses,
bacteria
• Particulate: smoke, dust, man-
made mineral fibers, etc.
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Typical Atmospheric Dust Sample
1.0µm
3.0µm
5.0µm
0.5µm
Weight/
volume
Count
0.18%
11%0.25%
6.0%1.07%
6.78%
80%
91.72%
1.0%
2.0%
Effective Range
Typical
Filtration Requirements and Costs
• Most filters do little or nothing in
the sub-micron range
• Over 90% of the cost of filtration is
• Energy
• Labor
• Disposal
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Operational Benefits
• Extend media life from months to
years.
• Operate at 1/3 the mid-life static
pressures of traditional filters.
• 1/3 of the energy use.
• Implement ASHRAE 62.1, IAQ
Procedure.
• Improved Indoor Air Quality
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Performance Comparisons
Testing Protocol Available On Request
24 x 24 Filters Compared At Rate To Bring A Closed Room To Equilibrium
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Economic Analysis
Rapid Return based on:
Reduced energy consumption:
• far lower pressure drop and
• the possibility of reduced outdoor air
Reduced media replacement costs:
• fewer filters and half the cost
Reduced maintenance costs:
• 1/3 or less the number of change outs and less disposal
Performance Comparison
Measurement
Specified Filters
Pre#1 / Pre#2 / HEPA
Dynamic
Air Cleaners
V8 / HEPA
24X24 inch Dust Holding
Capacity (grams)
170 / 150 / 240 2600 / 240
Media replacement
frequency (months)
3 / 12 / 18 36 / >24
Total Mid-Life Static
Pressure (Inches)
.68 / 1.0 / 1.68 .43 / 1.68
MERV Rating 8 / 15 / 17 15 / 17
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Case History
• 36,000 cfm
• Replace 95% cartridge and Pre-filters w/V8 modules
• 57,600 kWh/year savings
• 77,876 lbs/year less of C02 emissions
• 10 times the dust holding capacity
Deliverable
•Reduce Fan static by 1 inch mid-life
and 1.75 inches dirty
• Avoid larger fan motor
• Reduce discharge and radiated sound
levels
•Extend Media life nearly 10 times
•Payback in less than 2.2 years
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Reviewing Benefits
Dynamic Air Cleaners when properly applied
can:
•Significantly reduce sub-micron particles,
airborne pathogens and VOC’s (Volatile Organic
Compounds – Odors).
•Reduce energy consumption by saving on static
pressure vs high efficiency passive filters.
•Lower maintenance costs by saving on media
costs and frequency of changing when compared
to high efficiency passive filters.
•Potentially lower ventilation air requirements
through ASHRAE Std 62 IAQ procedure.
Typical Applications
•Any building using high efficiency passive filter i.e.
65%, 85%,95% and HEPA filters.
• Building with a high density of people.
• Building using (or considering) the use of carbon
or potassium permanganate filters.
• Any building concerned about odors or particulates
in Ambient Air
• Clean Room applications – Mfg or Pharmaceuticals.
• Manufacturing facility generating a high
concentration of particles, like welding or
machine shop smoke.
