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    MinusA2 Air Purifier
      MinusA2 Air Purifier saves you space when you mount
        Meet the newest MinusA2 Artists Series
          Meet the Ultra Quiet MinusA2 Air Purifier


          BioGS 2.0 VS MinusA2


          MinusA2 780A

          MinusA2 700A

          BioGS 2.0 625A

          BioGS 2.0 550A
          Room Coverage
          (based on 2 air changes per hour)
          up to 815 sq. ft. up to 700 sq. ft. up to 625 sq. ft. up to 550 sq. ft.
          Dimension (inches) 20H x 21.4W x 7D 20H x 21.4W x 7D 22.2H x 16.6W x 9.8D 22.2H x 16.6W x 9.8D
          Warranty 5 Years 5 Years 5 Years 5 Years
          Price $599.95 $499.95 $399.95 $369.95
          True HEPA Filtration Yes Yes Yes Yes
          Air Purification Stages 1 - Pre-Filter
          2 - Medium Filter
          3 - HEPA Filter
          4 - Customized Filter
          5 - Charcoal Filter
          6 - Negative Ions
          1 - Pre-Filter
          2 - Medium Filter
          3 - HEPA Filter
          4 - Customized Filter
          5 - Charcoal Filter
          6 - Negative Ions
          1 - Pre-Filter
          2 - Charcoal Filter
          3 - HEPA Filter
          4 - Negative Ions
          1 - Pre-Filter
          2 - Charcoal Filter
          3 - HEPA Filter
          4 - Negative Ions
          Ozone Emissions Zero* Zero* Negligible** Negligible**
          CADR 208 Pollen
          200 Dust
          193 Smoke
          201 Pollen
          200 Dust
          193 Smoke
          189 Pollen
          165 Dust
          152 Smoke
          162 Pollen
          149 Dust
          135 Smoke
          Air Flow (Cubic Feet per minute) Speed 1 - 58 CFM
          Speed 2 - 80 CFM
          Speed 3 - 112 CFM
          Speed 4 - 159 CFM
          Speed 5 - 218 CFM
          1 - 47 CFM
          2 - 64 CFM
          3 - 97 CFM
          4 - 140 CFM
          5 - 187 CFM
          1 - 42 CFM
          2 - 66 CFM
          3 - 95 CFM
          4 - 137 CFM
          5 - 167 CFM
          1 - 42 CFM
          2 - 66 CFM
          3 - 78 CFM
          4 - 117 CFM
          5 - 147 CFM
          Noise Level (Decibels) Speed 1 - 25.6 dBA
          Speed 2 - 31.1 dBA
          Speed 3 - 37.4 dBA
          Speed 4 - 44.5 dBA
          Speed 5 - 51.3 dBA
          1 - 20.8 dBA
          2 - 24.6 dBA
          3 - 31.3 dBA
          4 - 39.2 dBA
          5 - 45.6 dBA
          1 - 22.8 dBA
          2 - 28.6 dBA
          3 - 37.2 dBA
          4 - 46.7 dBA
          5 - 50.4 dBA
          1 - 22.8 dBA
          2 - 28.6 dBA
          3 - 33.5 dBA
          4 - 44.3 dBA
          5 - 48.6 dBA
          Filter Life Span 1 - 2 years 1 - 2 years 1.5 - 3 years 1.5 - 3 years
          Annual Filter Replacement Cost
          (based on 24/7 continuous operation)
          $85 $85 $53.30 $53.30
          Power Consumption 7 to 61 watts
          (Energy Star)
          7 to 47 watts
          (Energy Star)
          5 to 39 watts
          (Energy Star)
          5 to 29 watts
          (Energy Star)
          Colors Available White
          Black
          White White White
          Stand Alone / Wall Mountable Stand Alone /
          Wall Mountable
          Stand Alone /
          Wall Mountable
          Stand Alone Stand Alone
          Ultra Quiet Yes Yes Yes Yes
          Particle Sensor Yes Yes Yes Yes
          Odor Sensor Yes Yes Yes Yes
          Light Sensor Yes Yes No No
          Remote Control Yes Yes Yes Yes
          Deodorization Yes Yes Yes Yes
          Weight 19.4 lbs. 19.4 lbs. 16.8 lbs. 16.8 lbs.

          *Zero ozone emission with the negative ion generator turned off. An amount of 0.002 ppm (parts-per-million) was recorded on the low fan speed with the negative ion generator turned on. That is 25 times less than the 0.05 ppm maximum ozone concentration safety standard set forth by the California Air Resource Board.

          **An amount of 0.001 ppm (parts-per-million) was recorded with the negative ion generator turned on. That is 50 times less than the 0.05 ppm maximum ozone concentration safety standard set forth by the California Air Resource Board.

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