Search for Rabbit Air purifier decibels and the product pages give you a range, such as "Noise Level 20.3 to 51.0 dBA" for the A3. Rabbit Air's model comparison page goes much further. It lists a dBA figure for each of the five fan speeds on every current model, with the airflow and the power draw at each speed beside it. That is the most complete set of noise figures we have found from any purifier maker.
We read the US product page, the user manual and the comparison table for every air purifier on Rabbit Air's US store. Three designs are on sale, in four US model numbers, and all four carry per-speed figures: the A3 SPA-1000N, the MinusA2 SPA-780A and SPA-780N, and the BioGS 2.0 SPA-550A. This page lists all of them, explains what Rabbit Air's labels mean, and ranks each model only against others on the same speed.
Our picks are listed above, with full specifications for each.
Each product page has a Tech Specs table with one noise line, written as a range: "Noise Level 20.3 to 51.0 dBA" for the A3, "25.6 to 51.3 dBA" for the MinusA2 and "22.8 to 48.6 dBA" for the BioGS 2.0. The range does not say which speed each end describes.
Rabbit Air's "Compare A3, MinusA2 and BioGS 2.0" page answers that. Its Noise Level row lists five figures per model, numbered 1 to 5, with "(Lowest speed)" above speed 1 and "(Highest speed)" below speed 5. For the A3 it reads "1 - 20.3 dBA" through "5 - 51.0 dBA". The ends of each product page range match speed 1 and speed 5 in that table, so the low figure on every Rabbit Air product page is the lowest fan speed and the high figure is the highest.
The figures are in dBA, which means they are weighted toward the frequencies people hear best. Our explainer on what dBA means covers why that matters. Rabbit Air does not state a measuring distance or a test standard for any of them.
The speed names differ between manuals, which is why we rank on Rabbit Air's speed numbers rather than the names:
- MinusA2. The manual lists "Silent > Low > Medium > High > Turbo" and says "The lowest speed is Silent. The highest speed is Turbo."
- A3. The manual says the Fan Speed button "cycles manual speed from level 1 to 5", with "1 LED = Silent", "3 LED = Medium" and "5 LED = High". There is no Turbo label.
- BioGS 2.0. The manual says "Low fan speed is indicated by a single light. High fan speed is indicated by five lights."
Rabbit Air's FAQ adds a note for Alexa users: asking for "high" can send the purifier to Turbo, so it suggests saying "manual low or manual high" to get the speed you meant.
The MinusA2 SPA-780A and SPA-780N share one set of figures, so they appear once. Each list runs quietest first.
Speed 1, the lowest speed
- A3 SPA-1000N: 20.3 dBA; 64 CFM; 4.7 W.
- BioGS 2.0 SPA-550A: 22.8 dBA; 42 CFM; 4.7 W.
- MinusA2 SPA-780A and SPA-780N: 25.6 dBA; 58 CFM; 5.8 W.
Speed 2
- A3: 23.9 dBA; 82 CFM.
- BioGS 2.0: 28.6 dBA; 66 CFM.
- MinusA2: 31.1 dBA; 80 CFM.
Speed 3
- A3: 33.5 dBA; 144 CFM.
- BioGS 2.0: 33.5 dBA; 78 CFM.
- MinusA2: 37.4 dBA; 112 CFM.
Speed 4
- A3: 40.4 dBA; 200 CFM.
- BioGS 2.0: 44.3 dBA; 117 CFM.
- MinusA2: 44.5 dBA; 159 CFM.
Speed 5, the highest speed
- BioGS 2.0: 48.6 dBA; 147 CFM; 29.3 W.
- A3: 51.0 dBA; 286 CFM; 60.3 W.
- MinusA2: 51.3 dBA; 218 CFM; 61.2 W.
Two patterns stand out. The A3 has the lowest figure at speeds 1, 2 and 4, ties the BioGS 2.0 at speed 3, and moves more air than either of the others at every speed. The BioGS 2.0 is the one with the lowest figure at speed 5, but it moves about half the A3's air there. The same speed number is not the same amount of air from model to model, so a lower figure on one speed does not mean the same cleaning for less noise.
Rabbit Air also sells the BioGS 2.0 in a larger SPA-625A version, rated for 625 sq ft. It was listed as sold out when we checked, and Rabbit Air publishes no noise figure for it, so it is not ranked here. The MinusA2 220V model is built for 220V outlets, not the US 120V supply.
Special editions and front panels
Rabbit Air sells the A3 and MinusA2 in many dressed-up versions: Artists Series front panels such as Starry Night and Great Wave for $20 more, plus Asthma & Allergy Friendly, Peanuts and Hello Kitty editions. They carry the same model numbers, SPA-1000N, SPA-780A and SPA-780N, and Rabbit Air publishes no separate noise figure for any of them. On the A3, Rabbit Air does give the Artists Series panel a slightly lower rating, 1,030 sq ft at 2 air changes an hour against 1,070 for the Standard panel, and a smoke CADR of 256 against 257. A panel is a change to the air path, so we would not assume the noise is identical, but Rabbit Air does not say it differs.
What the room sizes mean
Rabbit Air sizes each model two ways. "Normal residential use" is 2 air changes an hour: 1,070 sq ft for the A3, 815 for the MinusA2 and 550 for the BioGS 2.0. "Allergy sufferer use" is 4 air changes an hour: 535, 408 and 275 sq ft. Both assume an 8 foot ceiling, and the product pages say the coverage is "when the air purifier is operating on the highest fan speed."
That last point is the one that matters for noise. A room size is what the purifier can do on speed 5, its loudest setting. If you buy a model rated for exactly your room, you will need speed 5 to reach that rate. If you buy one rated for a much larger room, a lower, quieter speed can do the same job. For example, the A3 on speed 3 moves 144 CFM at 33.5 dBA, roughly what the BioGS 2.0 moves on speed 5 at 48.6 dBA. Our bedroom air purifier guide works through that sizing sum for a typical bedroom.
What the gaps mean
Decibels are logarithmic. Roughly every 10 dBA sounds about twice as loud. The A3's own range shows how big the steps are: 20.3 dBA on speed 1 against 51.0 dBA on speed 5 is a gap of about 30 dBA, so the top speed sounds roughly eight times as loud. The big steps come in the upper speeds. The A3 climbs 10.6 dBA from speed 4 to speed 5, the BioGS 2.0 climbs 10.8 dBA from speed 3 to speed 4, and the MinusA2 climbs 7.1 dBA from speed 3 to speed 4.
Small gaps between models matter less. The A3 and MinusA2 differ by 0.3 dBA on speed 5, and the BioGS 2.0 and MinusA2 by 0.2 dBA on speed 4. With no measuring distance stated, we treat a gap under about 2 dBA as a tie. Our decibel chart sets published appliance figures beside everyday sounds.
Rabbit Air sets its own figures beside such sounds too. Its product pages list "Clock tick 20 decibels", "Rabbit Air A3 SPA-1000N 20.3 decibels" and "Whisper 30 decibels". Those are the speed 1 figures only.
Rabbit Air's quiet features, by their real names
BLDC motor. Rabbit Air says its "advanced BLDC Motor with inverter control that operates at five different speeds" means "At its lowest speed, the air purifier barely makes a sound. The absence of motor brushes makes our motor a much quieter, more efficient unit." All three current designs use it.
Sleep Lighting (MinusA2). The MinusA2's light sensor switches to Sleep Lighting after three minutes of dark, turning off the Mood Light and Air Quality Indicator. The SPA-780A manual says that in Auto Mode "the fan speed of the air purifier will automatically change to silent, minimizing energy consumption and noise." It adds: "Sleep Lighting will not override the fan speed if the MinusA2 is operating in one of its manual speeds or Pollen Mode."
Light Sensor (A3). The A3's Light Sensor puts the unit into All Lights Off, turning off all LEDs and the Mood Light, if the room is dark for 3 minutes. You turn it on by holding the Auto Mode and Light Control buttons for 2 seconds. The A3 manual says nothing about the fan in this mode, so we do not assume Auto Mode slows down.
Idle mode and timer (BioGS 2.0). The BioGS 2.0 has no light sensor, per Rabbit Air's comparison table. Its manual says "When the unit has been idle for five minutes, the user interface lights will disappear." The remote sets a 4, 8 or 12 hour timer.
Auto Mode and sensitivity. All three adjust the fan from particle and odor sensors. Rabbit Air describes the sequence: "When it senses particles or odors in the air, the machine increases fan speed. The machine switches over to high speed until the air has been cleaned." On the A3, tapping the Auto Mode button cycles sensor sensitivity through High, Medium and Low. On the MinusA2 SPA-780N, holding Speed and Mode for three seconds lets you choose Low, Standard or High. Lower sensitivity means fewer jumps to the loud speeds, which our pet air purifier guide found matters in a home with a shedding dog or cat.
All Lights Off. The MinusA2 SPA-780A and BioGS 2.0 remotes have an All Lights Off button, "accessible through the remote only".
Rabbit Air's quiet page calls these "Ultra Quiet Air Purifiers" and says "When operated at low speed, our air purifiers are nearly silent." That is Rabbit Air's description, tied to low speed, not a figure.
Keeping a Rabbit Air quiet
Rabbit Air's manuals and care pages say to clean the pre-filter every 3 months or as needed, by vacuuming or washing it, and to replace the filters every 12 months of 24 hour use on the A3 and MinusA2, or every 18 months on the BioGS 2.0. A clogged filter makes the fan work harder for the same air. If you wall mount an A3, its manual recommends "at least two feet of clearance from air outlet and eight inches of clearance on either side", and says to use only the approved Rabbit Air wall-mount kit.
One older Rabbit Air page compares the MinusA2 SPA-780A with an IQAir and a Blueair model. It lists the MinusA2 at "23.9 dBA - 50.2 dBA", 8 to 53 watts and $549.95. The current MinusA2 product page and comparison table say "25.6 to 51.3 dBA", 6 to 61 watts and $599.95. The older page appears to describe an earlier version of the unit, though Rabbit Air does not say so. We rank on the current product page and comparison table, which agree with each other.
How Rabbit Air compares
This page ranks Rabbit Air models only against each other. For how they sit among other brands, on each maker's own published figures, see our guide to the quietest air purifiers. Rabbit Air, like most makers, states no measuring distance or standard, so read our explainer on why decibel ratings rarely compare across brands before treating a small gap as real. For another maker that labels both ends of every range by speed and prints the airflow beside them, see our Alen air purifier decibels page.
How we chose
We read Rabbit Air's US store, its product sitemap and its model comparison page, and opened the product page and user manual for every air purifier on sale. We recorded each noise figure in Rabbit Air's words, with the speed number it describes, and noted where an older page disagrees. We ranked speed 1 figures against speed 1 figures, and so on up to speed 5, never one speed against another. Prices are Rabbit Air's US list prices on October 4, 2026.
We did not measure any of these purifiers. Every figure here is Rabbit Air's own, from its product pages, comparison table and manuals, and Rabbit Air states no measuring distance or test standard for any of them. Owners' rooms, floors and filters will change what they hear.
