Darwin Technology International LTD

“The first time we tested ifD we thought there was something wrong with our instruments because we were detecting almost no particles. After double checking we realized the instruments were fine—the “problem” was that the ifD filter was so efficient there was almost nothing to detect.”

—Al Vatine
President, LMS Laboratories

Leading the Industry in Advanced Air Purification

ifD VS. HEPA

Beyond HEPA in more ways than one.
  HEPA ifD
Efficiency
(particle capture
0.3 microns)
Excellent
99.97%
Excellent +
Up to 99.99%
Pressure Drop
(resistance)
Poor
0.6 - 1.2” wg (150-350 pascals)
Excellent
0.04 - 0.2” wg (10-50 pascals)
Energy Cost
(@ $0.10/kWh)
Poor
2’ X 2’ filter may add $400 or
more per year in electricity costs.
Excellent
Comparable ifD filter will add
only about $90/year in electricity
costs.
Maintenance
Cost
Poor
Final and/or pre-filters require
frequent replacement/disposal.
Excellent
Occasional cleaning takes only
minutes.
Service Life Poor
Loads quickly unless configured
with substantial pre-filtration.
Excellent
Properly maintained ifD filter is
permanent: Never needs
replacing.
Noise Poor
High pressure drop = high noise
Excellent
Low pressure drop = quiet air
flow