Blueair Pro M vs 403… which of these Blueair air purification system is better for your room size? Do they differ much in features? What is more suited for your home?

To help you with the answer, we’re giving you this comparison report. First, here’s a quick background on these two air purifiers.

The Blueair Pro catalogue, as advertised on the company’s official website, is designed primarily for office settings. To quote the brand, it’s created to “make everyone at work or home feel better and become more productive.” Note that it can also be for the home.

On the other hand, the 403 is part of another line of Blueair air purifiers called “Classic.” Wifi-enabled and equipped with HEPASilent technology, the Classic 403 is designed for mid-sized rooms.

From those introductory statements alone, you can have an idea of which Blueair air purifier to choose. But before making a decision, read on to know the complete list of differences between these air-cleaning tools in this Blueair Pro M vs 403 comparison report.

Also read: Blueair Sense+ vs Pro M: Air Purifier Comparison

Comparison Chart: Blueair Pro M vs 403

Let’s start with this side-by-side comparison chart. Scroll down to know which areas these air purifers differ in.

Blueair Air Purifiers
Model Check Price » Pro M Check Price » Classic 403
Room size 36 sq. m. (390 sq ft) 34 sq. m. (370 sq ft)
CADR (Smoke, Dust, Pollen) 250, 285, 350 CFM 240, 240, 240 CFM
Air changes per hour 5 5
Dimensions (H x W x D) 430 x 504 x 240 mm (17 x 20 x 10 in) 590 x 500 x 275 mm (23 x 20 x 11 in)
Product weight 12 kg (26 lb) 15 kg (33 lb)
Energy consumption 11 – 85 watts 35 – 80 watts
Sound level 32 – 55 dB(A) 32 – 52 dB(A)
Control Panel Buttons (+ and -) Mechanical knob
Electronic sensors, remote, on/off timer ❌ ❌
Filter replacement indicator ✅ ✅
Particle Filter ✅ ✅
Air Intelligence Module ✅ (Optional) ❌
Speed control options 1 – 2 – 3 (+AUTO with Air Intelligence Module) 1 – 2 – 3 – 4
Casters ❌ Optional
Air outlet Side Side
Air inlet Side Side

Key Differences

You’ve seen the chart above. Here, we list down the key differences between the Blueair Pro M and the Blueair Classic 403.

Room Size and CADR Rating

One of the most important differences between these two Blueair air purifiers is their coverage area and CADR rating.

Overall, both models are designed to purify a small to medium-sized room. The Blueair Pro M covers up to 390 sq. ft. of living space while the Classic 403 is designed for up to 370 sq. ft. As you can see, there is only a slight difference, but the Pro M covers more.

The difference between these air purifiers’ CADR or CFM rating also favors the Blueair Pro M. Note that CADR is a measure of how much volume of airborne pollutants is filtered per minute. In general, the higher the CADR number, the better the air purifier.

Weight and Size

When it comes to weight and size, there are some noticeable differences between the Pro M and the Classic 403.

Which one’s heavier? Weighing 33 lbs., it’s the Classic 403. In comparison, the Blueair Pro M weighs 26 lbs.

Which one is taller? It’s also the Classic 403, standing 23 inches. In comparison, the Blueair Pro M is 17 inches tall. The Classic 403 is also bulkier by an inch.

Also read: Blueair 405 vs 505 Air Purifier Full Comparison

Features and Control Panel

The Pro M and the Classic 403 have several features in common. For instance, both of them come with the same particle filter, and they’re both equipped with HEPASilent technology, a feature that efficiently captures airborne particles using less energy and less noise.

But they differ in control panels.

The Pro M comes with a simple set of + and – buttons, which you can use to adjust the speed of the air purifier. And if you opt to have the optional Air Intelligence Module, your unit can detect air quality and automatically adjusts the settings based on its readings.

On the other hand, the Classic 403 comes with a mechanical knob that you can simply twist to choose from its 4 speed selections.

Take a look at the images below and compare the control panels.



Control Panel » Blueair Pro M



Control Panel » Blueair Classic 403


Our Final Word: Blueair Pro M vs 403

Which of these Blueair air purifiers should you buy? Here’s our recommendation.

Get the Blueair Pro M. Not only is it lighter, but it has a better CADR rating, a wide coverage area, and a simpler yet better-looking control panel. Let’s not forget that it’s compatible with the Air Intelligence Module.

Where to Buy the Blueair Pro M and Classic 403



Check Price » Blueair Pro M



Check Price » Blueair Classic 403

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Best Air Purifier 2023

Best Air Purifier 2023