The catch
Blueair Classic Pro CP7i
Compared with the Blue Pure 211i Max, the 32-pound cabinet is much heavier.
Side by side
Blueair Classic Pro CP7i vs Blueair 211i Max: 211i is lighter to lift, CP7i suits a wide, shallow spot
Quick verdict
The 211i Max is the pick for more smoke airflow and easier lifting. A broad, shallow space with a fixed installation suits the Classic Pro CP7i.
Before you buy
Why, and what it costs you
Compare room sizes at an equal turnover rate
Blueair Classic Pro CP7i works out to about 590 square feet and Blueair 211i Max to 653, at five air changes per hour and an eight-foot ceiling.
Where this comes from
Area = CADR × 60 / (ceiling feet × air changes per hour). Inputs are 393 and 435 CFM, 8 feet and 5 changes. Smoke CADR at maximum speed is used. Real conditions are affected by air mixing, furniture, open doors and filter loading.
The catch
Blueair Blue Pure 211i Max
You can't turn off the HEPASilent ionization stage, which stays active all the time.
Blueair Classic Pro CP7i
- Why pick it
- It has to be shallow from front to back
- The steel cabinet is going to stay in a single room
- The catch
- Compared with the Blue Pure 211i Max, the 32-pound cabinet is much heavier.
Blueair Blue Pure 211i Max
- Why pick it
- More airflow and less weight to lift is the goal
- A single main filter is simpler to budget for
- The catch
- You can't turn off the HEPASilent ionization stage, which stays active all the time.
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What this page compares
More smoke airflow and easier lifting point to the 211i Max. The Classic Pro CP7i suits a broad, shallow space and a fixed installation.
Smoke airflow isn't won by the premium cabinet
Which one fits
Pick the situations that sound like you
The room is big enough to call for extra airflow
With the same five-change target and eight-foot ceiling, Blueair Classic Pro CP7i has a calculated limit of 590 square feet and Blueair 211i Max has 653. Allow margin if you want to run below maximum speed.
- Blueair Classic Pro CP7i
- Depends
- Blueair Blue Pure 211i Max
- Better fit
The cabinet needs to fit next to furniture
Blueair Classic Pro CP7i needs 19.7 inches of width and 9.9 inches of depth, and Blueair 211i Max needs 14.4 by 14.4. Intake clearance comes on top, so measure the gap in both directions.
- Blueair Classic Pro CP7i
- Depends
- Blueair Blue Pure 211i Max
- Depends
I want to run it from another room
App control is supported on both Blueair Classic Pro CP7i and Blueair 211i Max, so it doesn't separate them. Use the room and placement checks next.
- Blueair Classic Pro CP7i
- Better fit
- Blueair Blue Pure 211i Max
- Better fit
Ceiling height is ten feet
Put the ceiling at ten feet with five air changes and the modeled room areas come down to 472 square feet for Blueair Classic Pro CP7i and 522 for Blueair 211i Max. That is 20% less floor area than the eight-foot example, since the purifier has more air to move.
- Blueair Classic Pro CP7i
- Depends
- Blueair Blue Pure 211i Max
- Depends
In practice
Differences you will notice
Compare room sizes at an equal turnover rate
Blueair Classic Pro CP7i works out to about 590 square feet and Blueair 211i Max to 653, at five air changes per hour and an eight-foot ceiling.
How we worked this out
Area = CADR × 60 / (ceiling feet × air changes per hour). Inputs are 393 and 435 CFM, 8 feet and 5 changes. Smoke CADR at maximum speed is used. Real conditions are affected by air mixing, furniture, open doors and filter loading.
Measure the cabinet first, then buy
Blueair Classic Pro CP7i has a 195-square-inch cabinet envelope, versus 207.4 for Blueair 211i Max. A shallower shape may still need more wall width.
How we worked this out
Width × depth: 19.7 × 9.9 = 195 in² and 14.4 × 14.4 = 207.4 in². The cabinet bounding rectangles are measured, without required air clearance.
With the CP7i, the weight you lift nearly doubles
Next to the 211i Max, the Classic Pro CP7i weighs 15.8 pounds more and delivers about 10% less published smoke CADR.
How we worked this out
32 - 16.2 = 15.8 lb. (435 - 393) / 435 × 100 = 9.7%. Neither the cabinet material nor the feature set shows better particle throughput.
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.
Blueair Classic Pro CP7i
Works with your numbers393 CFM of verified clean-air delivery works out to about 9.8 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
Blueair Blue Pure 211i Max
Works with your numbers435 CFM of verified clean-air delivery works out to about 10.9 air changes per hour in this room. Hitting the 5 ACH target takes 200 CFM.
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
Blueair, CP7i
Classic Pro CP7i
This purifier has a heavy steel cabinet, two filters and a high particle CADR. Because it is shallow from front to back, it can suit a broad wall better than a large round purifier.
- Best for
- A large room with a wide, shallow spot for the unit, where app control is wanted
Facts we checked
- US-model CADR: 393 CFM for smoke, 387 for dust and 441 for pollen.
- The cabinet is 19.7 inches wide, 9.9 inches deep and 23.6 inches tall, and it weighs 32 lb.
- Blueair specifies two filters, sound of 24 to 55 dB and an operating range of 2.6 to 58 watts.
Option B
Blueair, 211i Max
Blue Pure 211i Max
This large-room cylinder runs quietly and efficiently, with a high CADR, a washable fabric prefilter and handy app automation.
- Best for
- Open living areas, pets and smoke, when quiet high airflow outranks deep gas filtration
Facts we checked
- Blueair lists a room size of 674 square feet at 4.8 air changes per hour.
- Published CADR is 435 CFM for smoke, 452 for dust and 450 for pollen.
- The purifier weighs 16.2 pounds, has app, auto and night modes, and is rated at 23 to 53 dB.
Spec by spec
Where they really differ
| Spec | Blueair Classic Pro CP7i | Blueair Blue Pure 211i Max | In practice |
|---|---|---|---|
| Smoke CADR | 393 CFM | 435 CFM | Better to rely on a smoke-specific rate than on a one-air-change marketing room size. |
| Pollen CADR | 441 CFM | 450 CFM | The model that leads on smoke does not necessarily lead on pollen as well. |
| Cabinet width and depth | 19.7 × 9.9 in | 14.4 × 14.4 in | Check both dimensions against the real gap, and keep the clearance the manual calls for around the intakes. |
| Remote app control | Included | Included | Remote schedules matter if the purifier sits far from where you spend your day. |
| Automatic sensor response | Included | Included | Apps and pollution sensors do separate jobs, and a schedule tells you nothing about air quality. |
| Ionizer or electrostatic stage | always-on | always-on | If a purely mechanical filter path is what you want, treat this preference as a firm requirement. |
| Published weight | 32 lb | 16.2 lb | A heavy cabinet bothers you less if it stays put than if it must go upstairs every day. |
| Rated power | 58 W | 46 W | Rated input is a comparison of upper limits. Actual consumption shifts with Auto mode and lower fan settings. |
Trade-offs
What each pick costs you
With Blueair Classic Pro CP7i
- HEPASilent works through electrostatic charging, so pick a mechanical-only model if you must avoid that air-cleaning method.
With Blueair Blue Pure 211i Max
- To keep airflow up, the fabric prefilter has to be vacuumed or washed from time to time.
Decision guide
How to decide
Go with the 211i Max if you want more smoke airflow and lighter lifting. The Classic Pro CP7i is for a broad, shallow space and a fixed installation.
Smoke airflow isn't won by the premium cabinet
At 393 smoke CFM, the CP7i is below the 211i Max at 435. Pick Classic Pro for its physical layout and features, and not for a capacity advantage you've assumed.
Shape is where it fits better
The 211i Max is 14.4 inches square, and the CP7i measures 19.7 inches wide by 9.9 deep. Being shallow, the Classic Pro can keep a walkway open, but it needs more wall width and clear side outlets.
Carrying it around is a substantial penalty
The CP7i weighs 32 pounds, almost twice what the 211i Max does. It also takes two filters, so compare a full replacement set when working out what the upgrade costs to maintain.
What this page can’t tell you
- CADR is based on the maximum rated fan speed, and minimum noise and maximum airflow occur at different operating points.
- What these calculations compare is particle-cleaning capacity. Nothing in them promises health outcomes or the removal of a specific gas.
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 14 of the 70 models checked meet every need here: “Wildfire smoke makes its way inside”, “Floor space is very tight for me”, and “I want it to respond automatically”.
14 models fit, out of 70 checkedThe gap in numbers
Blueair Blue Pure 211i Max lists 435 CFM for listed smoke CADR, 11% more than the 393 CFM on Blueair Classic Pro CP7i.
- Blueair Classic Pro CP7i
- 393 CFM
- Blueair Blue Pure 211i Max
- 435 CFM
- Models with this figure
- 20 of 70
Show the facts and the math
How we countedThe count uses each product's current fit ratings for “Wildfire smoke makes its way inside”, “Floor space is very tight for me”, and “I want it to respond automatically”. A need with no documented match is not counted.
How we calculatedOnly figures stated as smoke CADR go into this median. General maximum-airflow numbers are left out. For context, 20 of 70 models publish comparable figures.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Blueair Classic Pro CP7i |
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| |
| Blueair Blue Pure 211i Max |
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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.
Blueair Classic Pro CP7i
It has to be shallow from front to back
See price & reviews on AmazonBlueair Blue Pure 211i Max
More airflow and less weight to lift is the goal
See price & reviews on AmazonEach link opens in a new tab.
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