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MinusA2 Air Purifier - Compare

BioGS 2.0 VS MinusA2


MinusA2 780A/N

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 SPA-780A: $599.95
SPA-780N: $619.95
$549.95 $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 200 Pollen
193 Dust
180 Smoke
171 Pollen
173 Dust
166 Smoke
180 Pollen
165 Dust
154 Smoke
162 Pollen
149 Dust
136 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
Royal
White
Stand Alone / Wall Mountable Stand Alone /
Wall Mountable
Stand Alone /
Wall Mountable
Stand Alone Stand Alone
Wireless Connectivity (iOS and Android) SPA-780N Only No No No
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. 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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