BLUEAIR Signature SP1i Smart Air Purifier, Model 4512311000

Model: BLUEAIR Signature SP1i is a compact smart air purifier listed for rooms from small bedrooms to larger spaces, with app controls, automatic operation, and an air-quality display. Its room-coverage claims use different cleaning rates, so the larger hourly figure should not be read as equivalent to the recommended room size for frequent air changes.

At a glance

App control supports fan-speed changes, schedules, and remote settings, while Auto Mode adjusts purification based on indoor air conditions.
The air outlet indicator presents air-quality levels in five colors.
Listing claims 19 dB on low and up to 50 dB on high, with different noise levels depending on fan setting.
Optional interchangeable pre-filters are mentioned, but the listing does not identify any as included.

Price

$125.99Save 30%

Reference price: ~~$179.99~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

Compact listed dimensions may suit desks, shelves, or smaller rooms where floor space is limited.
App scheduling and Auto Mode offer alternatives to adjusting fan speed manually.
The listing describes filtration for particles and odor-related gases, with a visible air-quality indicator.

Technical specifications

12 specifications

Identity
Brand	Blueair
Model	4512311000

Room coverage and filtration
Room cleaned in 12.5 minutes	248 sq ft
Hourly coverage claim	1,190 sq ft every hour
Filter technology	7-stage HEPASilent filtration
Particle capture claim	99.97%** of airborne particles down t.o 0.1 microns

Operation and controls
Noise on low	19 db
Noise on high	50 dB
Air-quality indicator	5 easy-to-read colors
Controls	Blueair app
Operating mode	Auto Mode

Dimensions and installation
Dimensions listed	9.37 x 9.37 x 13.82 inches; 5.64 pounds

What to know before buying

Listing details to confirm

The title's 1,190 ft² claim refers to hourly coverage, while the manufacturer recommends around 248 ft² for cleaning at four air changes per 12.5 minutes. Choose based on the room size and cleaning rate you need. Listing details are inconsistent: the title calls the product SP1i and claims up to 1,190 ft², while the description calls it Blue Signature Small and gives both 248 ft² per 12.5 minutes and 1,190 ft² per hour. The filtration claim includes the wording “down t.o 0.1 microns,” and the listed noise claims specify 19 dB on low and 50 dB on high. Confirm the selected model and applicable coverage details before purchase.

Who is it for?

A good fit for

People seeking a compact purifier for a bedroom, nursery, dorm, home office, or other small space.
Buyers who want app-based scheduling, remote fan control, and automatic adjustment.
Those who value a visible air-quality indicator and manufacturer-claimed low-speed noise of 19 dB.

Less suited to

Buyers who need an unambiguous large-room cleaning rate without reconciling the listing's different coverage figures.
Anyone requiring confirmed included interchangeable pre-filters, since these are described as optional.

BLUEAIR Signature SP1i Smart Air Purifier, Model 4512311000 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 94 ratings

5 stars83%83%
4 stars9%9%
3 stars4%4%
2 stars1%1%
1 star3%3%

Customer feedback describes the purifier as easy to set up and use, quiet, attractive, and effective, with favorable comments about its compact size and air-quality monitoring. Those impressions align with the listing's app controls, display, and small footprint, but they are customer perceptions rather than confirmation of the stated coverage or filtration performance. Aggregate ratings lean strongly toward five stars, though a smaller share of ratings are lower.

Positive themes

Customers praise quiet operation, design, ease of use, and air-cleaning performance.
Feedback notes the size as suitable for a small bedroom and calls out air-quality monitoring.

Frequently asked questions

What room size is this purifier intended for?

The manufacturer recommends around 248 ft² for cleaning at four air changes per 12.5 minutes. The separate 1,190 ft² claim is stated as hourly coverage, not the same cleaning rate.

Can I control the purifier remotely?

The listing says the Blueair app can change fan speed, schedules, and settings remotely. It also describes an Auto Mode that adjusts purification based on indoor air conditions.

How loud is it?

The listing gives 19 dB on low and no more than 50 dB on high. Noise depends on the fan setting.

Are replacement pre-filters included?

The listing describes interchangeable pre-filters as available in different colors, but does not say they are included in the package.