Which Model is Best for You

Choose BioGS Air Purifiers for:
  • General air quality issues such as dust and allergen removal
  • General household odors and chemicals
  • Seasonal allergies
Choose MinusA2 Air Purifiers for:
  • Musty odors from cigarettes, mildew, mold etc. (Choose Odor Remover customized filter)
  • Bacteria, virus and mold removal. Perfect for people such as babies, kids, elderly people, and those weakened by illness. (Choose Germ Defense customized filter)
  • VOCs and chemical fumes (Choose Toxin Absorber customized filter)
  • Heavy pet dander (Choose Pet Allergy customized filter)
  • Severe allergies


All Models

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Room Coverage (based on 2 air changes per hour) up to 815 sq. ft. up to 700 sq. ft. up to 780 sq. ft. up to 600 sq. ft.
Dimension (inches) 20H x 21.4W x 7D 20H x 21.4W x 7D 22.5H x 18W x 9D 22.5H x 18W x 9D
Warranty 5 Years 5 Years 5 Years 5 Years
Price $549.95 $459.95 $399.95 $329.95
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 - HEPA Filter
3 - Charcoal Filter
4 - Negative Ions
1 - Pre-Filter
2 - HEPA Filter
3 - Charcoal Filter
4 - Negative Ions
Ozone Emissions Zero* Zero* Zero Zero
CADR 208 Pollen
200 Dust
193 Smoke
201 Pollen
200 Dust
193 Smoke
217 Pollen
197 Dust
188 Smoke
163 Pollen
145 Dust
144 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 - 39 CFM
2 - 85 CFM
3 - 131 CFM
4 - 170 CFM
5 - 208 CFM
1 - 39 CFM
2 - 60 CFM
3 - 95 CFM
4 - 139 CFM
5 - 159 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 - 19.1 dBA
2 - 30.6 dBA
3 - 39.7 dBA
4 - 44.8 dBA
5 - 49.1 dBA
1 - 18.4 dBA
2 - 25.9 dBA
3 - 34.2 dBA
4 - 39.9 dBA
5 - 45.0 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)
$75 $75 $41 $41
Power Consumption: 6 to 61 watts
(Energy Star)
6 to 47 watts
(Energy Star)
7 to 60 watts 7 to 36 watts
Colors Available White
Black
White Chrome Silver
Pearl White
Lime Green
Metallic Blue
Chrome Silver
Pearl White
Lime Green
Metallic Blue
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. 17 lbs 17 lbs

*Zero ozone emission with negative ion generator turns off. An amount of 0.002 ppm (parts-per-million) was recorded at low fan speed with negative ionizer 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.

**BioGS BCRF Special Edition has same technical specification as BioGS SPA-421A.