The catch
Rabbit Air MinusA2
For what you pay to buy it, a 180-CFM smoke CADR is low.
Side by side
Rabbit Air MinusA2 vs Alen BreatheSmart 35i: MinusA2 can hang on a wall, 35i has no ionizer hardware
Quick verdict
Wall mounting or a selectable specialty filter that solves a specific problem points to the MinusA2. For a quieter bedroom purifier with no ionizer, comparable airflow and simpler filter selection, pick the 35i.
Before you buy
Why, and what it costs you
Where these two really part ways
Rabbit Air MinusA2 is the better match for “I'd rather swap filters less often”. Alen BreatheSmart 35i is the better match for “I don't want an ionizer in it” and “I'm setting it up in a nursery”.
Where this comes from
This lines up the current strong and useful fit ratings for the exact products. It does not roll them into one overall score.
The catch
Alen BreatheSmart 35i
Alen's broad one-hour coverage headline implies a bigger room than the 190-CFM rating can serve.
Rabbit Air MinusA2
- Why pick it
- The bundled wall-mount kit is needed.
- You'd use a dedicated Odor, Pet, Toxin or Germ layer.
- The catch
- For what you pay to buy it, a 180-CFM smoke CADR is low.
Alen BreatheSmart 35i
- Why pick it
- An ionizer-free air path is the aim.
- Sound at top speed should be lower.
- The catch
- Alen's broad one-hour coverage headline implies a bigger room than the 190-CFM rating can serve.
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What this page compares
Airflow, wall mounting, ionization, smart controls, noise and filter choices are weighed for these slim premium purifiers.
This one comes down to published airflow and placement first, then to the limits of your own setup.
Which one fits
Pick the situations that sound like you
I don't want an ionizer in it
Rabbit Air MinusA2 lists “Optional, switchable” for ionizer, while Alen BreatheSmart 35i lists “None”. This shows what the treatment path is designed to catch or reduce, and the upkeep it needs.
- Rabbit Air MinusA2
- Depends
- Alen BreatheSmart 35i
- Better fit
I'd rather swap filters less often
Under the listed conditions, the maker states a longer interval for the main filter.
- Rabbit Air MinusA2
- Better fit
- Alen BreatheSmart 35i
- Depends
I'm setting it up in a nursery
Rabbit Air MinusA2 lists “25.6 to 51.3 dBA” for sound range, while Alen BreatheSmart 35i lists “23 to 42 dB”. This counts most in bedrooms, shared spaces and long sessions.
- Rabbit Air MinusA2
- Depends
- Alen BreatheSmart 35i
- Better fit
I want it to respond automatically
Its onboard sensor can change the fan speed automatically. Check the model facts for what that sensor measures.
- Rabbit Air MinusA2
- Good
- Alen BreatheSmart 35i
- Better fit
It will be on all day
Running it around the clock is more reasonable given its documented power use and airflow.
- Rabbit Air MinusA2
- Depends
- Alen BreatheSmart 35i
- Better fit
In practice
Differences you will notice
Where these two really part ways
Rabbit Air MinusA2 is the better match for “I'd rather swap filters less often”. Alen BreatheSmart 35i is the better match for “I don't want an ionizer in it” and “I'm setting it up in a nursery”.
How we worked this out
This lines up the current strong and useful fit ratings for the exact products. It does not roll them into one overall score.
One of them covers more of your list
Alen BreatheSmart 35i meets 4 of the 4 needs this comparison is built around. Rabbit Air MinusA2 meets 3 and misses “I don't want an ionizer in it”.
How we worked this out
The count uses the current strong and useful fit ratings for these two products. Each need counts once, with no made-up score added on top.
How many models fit “I don't want an ionizer in it”
40 of the 70 air purifiers checked fit this need. Alen BreatheSmart 35i makes the cut. Rabbit Air MinusA2 does not.
How we worked this out
The count filters every model in the current category for a strong or useful fit on this single need.
Models that handle “I don't want an ionizer in it” and “I'll look at air quality on my phone”
17 of the 70 air purifiers checked handle both “I don't want an ionizer in it” and “I'll look at air quality on my phone”. Alen BreatheSmart 35i makes the cut. Rabbit Air MinusA2 does not.
How we worked this out
You can reproduce the count by filtering the current category for models with a strong or useful fit on both needs.
Plug in your numbers
Can either purifier keep up with your room?
This checks hard limits only. Personal preferences are left out of the math.
Rabbit Air MinusA2
Does not work with your numbers180 CFM of verified clean-air delivery works out to about 4.5 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
Alen BreatheSmart 35i
Check this one yourselfWe do not have a comparable verified smoke CADR for this exact model.
This uses each model’s pollutant-specific CADR at top speed and a target of five air changes per hour. Quieter settings clean less air. Raw airflow and one-change coverage claims are never swapped in.
Option A
Rabbit Air, SPA-780N
MinusA2
Slim enough to mount on a wall, this purifier has six filter stages, Wi-Fi and a specialty layer you select based on whether odor, pets or toxins matter most.
- Best for
- A bedroom or office where wall mounting and a customizable filter stack fix an actual placement problem
Facts we checked
- Rabbit Air's published CADR values are 180 CFM for smoke, 193 for dust and 200 for pollen.
- The cabinet is seven inches deep, includes a wall kit and runs from 25.6 to 51.3 dBA.
- On the MinusA2 platform, the SPA-780N adds Wi-Fi and app control.
Option B
Alen, 35i Ultimate
BreatheSmart 35i
There is no ionizer in this slim, quiet smart purifier, and the Ultimate filter gives it a stronger odor layer than the basic particle option.
- Best for
- A quiet bedroom or home office where app control and an ionizer-free air path count for more than maximum airflow
Facts we checked
- Alen publishes 190 CFM, a footprint of 13 by 7.6 inches and a height of 20.6 inches.
- It has a particle sensor and automatic fan control, and sound runs from 23 to 42 dB.
- The exact Ultimate-filter offer has no ionizer and carries a zero-ozone rating.
Spec by spec
Where they really differ
| Spec | Rabbit Air MinusA2 | Alen BreatheSmart 35i | In practice |
|---|---|---|---|
| Published airflow | 180-CFM smoke CADR | 190-CFM aggregate CADR | Higher published output is useful only if your room, surface or workload calls for the extra headroom. It does not, by itself, prove better results. |
| Placement | Floor or wall | Floor | Fit can be a hard limit, so measure your space and mounting points before anything else. |
| Ionizer | Optional, switchable | None | It shows what the treatment path is built to catch or reduce, and what upkeep that requires. |
| Sound range | 25.6 to 51.3 dBA | 23 to 42 dB | Bedrooms, shared spaces and long sessions are where it counts most. |
Trade-offs
What each pick costs you
With Rabbit Air MinusA2
- For a mechanical-only air path, switch off the negative-ion stage.
With Alen BreatheSmart 35i
- To qualify for the Forever Guarantee you need to register and keep a filter subscription active.
By the numbers
What the data shows
What we found across the air purifiers we compare, plus the checked facts behind each finding.
How many fit
Only 10 of the 70 models checked meet every need here: “I want it in my bedroom”, “Floor space is very tight for me”, “I don't want an ionizer in it”, and “I'll look at air quality on my phone”.
10 models fit, out of 70 checkedShow the facts and the math
How we countedThe count uses each product's current fit ratings for “I want it in my bedroom”, “Floor space is very tight for me”, “I don't want an ionizer in it”, and “I'll look at air quality on my phone”. A need with no documented match is not counted.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Rabbit Air MinusA2 |
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| Alen BreatheSmart 35i |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Rabbit Air MinusA2
The bundled wall-mount kit is needed.
See price & reviews on AmazonAlen BreatheSmart 35i
An ionizer-free air path is the aim.
See price & reviews on AmazonEach link opens in a new tab.
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