# Rabbit Air BioGS 2.0 vs Alen BreatheSmart 75i: specs and price compared

A sourced, side-by-side comparison of the Rabbit Air BioGS 2.0 (Rabbit Air) and Alen BreatheSmart 75i (Alen) among air purifiers. Rabbit Air BioGS 2.0 is the cheaper of the two at $369.95.

## Side by side

| Spec | Rabbit Air BioGS 2.0 | Alen BreatheSmart 75i |
| --- | --- | --- |
| US price | $369.95 | $799 |
| Brand | Rabbit Air | Alen |
| Released | 2017 | — |
| Cadr smoke (CFM) | 136 | — |
| Coverage (sq ft) | 550 | 1400 |
| Hepa | Yes | Yes |
| Filter type | Pre-filter + BioGS HEPA + Dual Hive AC Charcoal + Negative Ion Generator (4-stage) | Advanced Particle filter + Medical-grade True HEPA (H13) + Ionizer (switchable); optional Carbon layer (Fresh/Ultimate filters) |
| Noise db min | 22.8 | 25 |
| Smart | No | Yes |
| Energy star | No | Yes |

## Key differences

- Coverage (sq ft): Rabbit Air BioGS 2.0 550 vs Alen BreatheSmart 75i 1400
- Filter type: Rabbit Air BioGS 2.0 Pre-filter + BioGS HEPA + Dual Hive AC Charcoal + Negative Ion Generator (4-stage) vs Alen BreatheSmart 75i Advanced Particle filter + Medical-grade True HEPA (H13) + Ionizer (switchable); optional Carbon layer (Fresh/Ultimate filters)
- Noise db min: Rabbit Air BioGS 2.0 22.8 vs Alen BreatheSmart 75i 25
- Smart: Rabbit Air BioGS 2.0 No vs Alen BreatheSmart 75i Yes
- Energy star: Rabbit Air BioGS 2.0 No vs Alen BreatheSmart 75i Yes

## What reviewers say

**Rabbit Air BioGS 2.0** — Only one whitelisted tester, Tom's Guide, hands-on reviewed this exact model. It calls the BioGS 2.0 a quiet, inexpensive purifier that cleans a mid-sized room well, but flags weak airflow and the absence of WiFi or an app. Consensus rests on a single source. (1 sourced review.)

**Alen BreatheSmart 75i** — Two whitelisted hands-on reviews (TechHive 2023, TechRadar 2024) cover this exact model. Both are qualitative with no lab-measured numbers. Both praise the powerful airflow for very large rooms (up to ~1,300 sq ft), the swappable colored front panels, and simple onboard controls that work without the app. Both flag the high price, being overkill for small spaces, loud higher/auto fan speeds, bulk, and an app that is hard to find or unintuitive. They split sharply on setup and framing. (2 sourced reviews.)

## Sources

- Rabbit Air BioGS 2.0: https://www.rabbitair.com/pages/choose-your-air-purifier (rabbitair.com, verified 2026-06-15)
- Alen BreatheSmart 75i: https://alen.com/products/alen-breathesmart-75i-air-purifier (alen.com, verified 2026-07-07)

Canonical: https://frontdeskreview.com/gear/air-purifiers/rabbit-air-biogs-2-vs-alen-breathesmart-75i/
Cite: Per The Front Desk Review, Rabbit Air BioGS 2.0 ($369.95) vs Alen BreatheSmart 75i ($799) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/air-purifiers/rabbit-air-biogs-2-vs-alen-breathesmart-75i/
License: CC BY 4.0.