BLUEAIR Blue Pure 511i Max Smart Air Purifier for vs Honeywell Allergen Plus Compact HEPA Small Room
Updated August 2026 — BLUEAIR Blue Pure 511i Max Smart Air Purifier for wins on smart features and air quality, Honeywell Allergen Plus Compact HEPA Small Room wins on energy efficienc.
The BLUEAIR Blue Pure 511i Max outperforms the Honeywell Allergen Plus in coverage and smart features, making it the better choice for larger spaces. However, the Honeywell offers solid performance at a lower price.
Why BLUEAIR Blue Pure 511i Max Smart Air Purifier for is better
Coverage
Cleans up to 926 sq ft compared to 530 sq ft
Smart Features
Includes mobile app control and advanced sensors
Noise Level
Operates as low as 19 dB for quieter performance
Why Honeywell Allergen Plus Compact HEPA Small Room is better
Price
Cheaper at $99.99 compared to $111.99
Compact Design
Sleek tabletop design fits well in small spaces
Energy Efficiency
ENERGY STAR certified for low energy consumption
Overall score
Specifications
| Spec | BLUEAIR Blue Pure 511i Max Smart Air Purifier for | Honeywell Allergen Plus Compact HEPA Small Room |
|---|---|---|
| Filtration | HEPASilent | 3-in-1 HEPA |
| App Control | Yes | No |
| Auto Mode | Yes | Yes |
| Air Changes | 1x in 926 sq ft | 1x in 530 sq ft |
| Allergen Capture | 99.97% | 99.97% |
Dimension comparison
Overview of the BLUEAIR Blue Pure 511i Max
The BLUEAIR Blue Pure 511i Max is designed for larger spaces, offering impressive air cleaning capabilities for rooms up to 926 square feet. This smart air purifier utilizes HEPASilent technology to capture 99.97% of airborne particles down to 0.1 microns, including allergens and pet dander. At a current price of $111.99, it provides efficient air purification, especially beneficial for those dealing with allergies or pet-related issues. Its compact design and quiet operation make it suitable for bedrooms and small living spaces.
Overview of the Honeywell Allergen Plus
The Honeywell Allergen Plus Compact HEPA air purifier is a great option for smaller spaces, effectively purifying air in rooms up to 530 square feet. Priced at $99.99, it is about 17% cheaper than the BLUEAIR model. This purifier features a three-in-one filtration system that captures 99.97% of allergens and includes an activated carbon filter for odor reduction. The AQSense auto mode adjusts the fan speed based on real-time air quality, making it efficient and user-friendly for homes with pets and allergies.
Filtration Technology
The filtration technology of the BLUEAIR Blue Pure 511i Max is notable for its HEPASilent dual filtration, which combines mechanical and electrostatic processes. This allows it to filter out 99.97% of airborne particles, including pet dander and smoke, providing a thorough cleaning experience. In contrast, the Honeywell Allergen Plus utilizes a three-in-one HEPA filtration system, which also captures 99.97% of allergens but includes a separate activated carbon filter to tackle odors. While both purifiers excel in capturing allergens, the BLUEAIR's advanced technology may offer slightly better performance in larger areas.
Room Coverage
The BLUEAIR Blue Pure 511i Max is capable of purifying spaces up to 926 square feet, making it ideal for larger rooms such as living areas or open-plan spaces. It can clean 465 square feet in just 30 minutes, ensuring rapid air refreshment. On the other hand, the Honeywell Allergen Plus is designed for smaller rooms up to 530 square feet. Although it can filter air efficiently in its designated area, it circulates air at a lower rate compared to the BLUEAIR, which may be a limiting factor for those needing coverage in larger spaces.
Noise Levels
Noise levels are a crucial consideration when selecting an air purifier, especially for use in bedrooms. The BLUEAIR Blue Pure 511i Max operates quietly, with noise levels as low as 19 dB, making it a perfect choice for sleep environments. Conversely, the Honeywell Allergen Plus operates at a slightly higher level, with its sleep mode functioning at 20.81 dBA. While both models are designed to minimize disruption, the BLUEAIR may have a slight edge in terms of quieter operation, enhancing sleep quality in sensitive environments.
Smart Features
The BLUEAIR Blue Pure 511i Max incorporates smart technology with built-in air quality sensors that automatically adjust the fan speed according to pollution levels. Users can also monitor air quality and control settings through the Blueair mobile app, which adds convenience for tech-savvy consumers. The Honeywell Allergen Plus features its AQSense auto mode, which similarly adjusts fan speeds based on air quality but lacks the mobile app integration. For those who value smart features and connectivity, the BLUEAIR offers a more advanced solution.
Design and Aesthetics
In terms of design, the BLUEAIR Blue Pure 511i Max boasts a modern, compact Scandinavian-inspired look that fits seamlessly into contemporary home decor. Its 360° air intake allows for efficient circulation in small spaces. Meanwhile, the Honeywell Allergen Plus presents a sleek tabletop design that also fits well in tight areas like dorm rooms and offices. Both models prioritize functionality and aesthetics, but the BLUEAIR’s design may appeal more to those seeking a stylish addition to their living space.
Which should you buy?
Choosing between the BLUEAIR Blue Pure 511i Max and the Honeywell Allergen Plus ultimately depends on your specific needs. If you require coverage for larger spaces and value smart features, the BLUEAIR Blue Pure 511i Max, priced at $111.99, offers superior performance and a quieter operation. However, if budget is a primary concern and you need an effective solution for smaller rooms, the Honeywell Allergen Plus, available at $99.99, delivers solid performance and essential features at a lower price point. Consider your space size, budget, and desired features to make the best choice for your air purification needs.

