Most clean air per dollar.

Air purifier prices tell you nothing on their own. What matters is CADR, the industry-standard Clean Air Delivery Rate, and how much of it you get for your money. This ranks every popular model by cost per CADR, so the real value winners rise to the top. Filter by your room size to see only what will actually clear the air.

Prices and specs reviewed 31 July 2026 . Check the live listing, and remember to factor in ongoing filter costs.

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Air purifier	CADR	Room	Filter	Noise	Price	$/CADR
Medify MA-40Best value	330 CFM	840 ft²	H13 HEPA	30-58 dB	$170	$0.52	Check price
Medify MA-25	195 CFM	500 ft²	H13 HEPA	28-55 dB	$110	$0.56	Check price
Winix 5300-2	236 CFM	360 ft²	True HEPA	27-56 dB	$150	$0.64	Check price
Xiaomi Smart Air Purifier 4	235 CFM	480 ft²	True HEPA	24-64 dB	$150	$0.64	Check price
Winix 5500-2	243 CFM	360 ft²	True HEPA	27-56 dB	$160	$0.66	Check price
Winix AM90	243 CFM	360 ft²	True HEPA	27-56 dB	$170	$0.7	Check price
Levoit Core 300	141 CFM	219 ft²	True HEPA	24-50 dB	$100	$0.71	Check price
Medify MA-112	500 CFM	2,500 ft²	H13 HEPA	30-60 dB	$360	$0.72	Check price
Coway AP-1512HH Mighty	243 CFM	361 ft²	True HEPA	24-54 dB	$175	$0.72	Check price
Levoit Core 600S	410 CFM	635 ft²	True HEPA	25-54 dB	$300	$0.73	Check price
Winix C909	300 CFM	465 ft²	True HEPA	27-56 dB	$220	$0.73	Check price
Levoit Core P350 Pet	141 CFM	219 ft²	True HEPA	24-51 dB	$110	$0.78	Check price
Coway Airmega 200M	243 CFM	361 ft²	True HEPA	24-53 dB	$190	$0.78	Check price
Mila Air 3	447 CFM	1,000 ft²	True HEPA	20-55 dB	$350	$0.78	Check price
Levoit Vital 200S	254 CFM	380 ft²	HEPA	25-52 dB	$200	$0.79	Check price
GermGuardian AC4825	125 CFM	153 ft²	True HEPA	30-55 dB	$100	$0.8	Check price
Blueair Blue Pure 411a Max	120 CFM	190 ft²	HEPASilent	17-46 dB	$100	$0.83	Check price
Honeywell HPA300	300 CFM	465 ft²	True HEPA	35-60 dB	$250	$0.83	Check price
Levoit Core 400S	260 CFM	403 ft²	True HEPA	24-52 dB	$220	$0.85	Check price
Xiaomi Air Purifier 4 Pro	294 CFM	600 ft²	True HEPA	24-64 dB	$250	$0.85	Check price
Blueair Blue Pure 211i Max	350 CFM	540 ft²	HEPASilent	24-53 dB	$300	$0.86	Check price
Levoit 400S Smart	260 CFM	403 ft²	True HEPA	24-52 dB	$230	$0.88	Check price
Blueair Blue Pure 311i Max	250 CFM	388 ft²	HEPASilent	23-51 dB	$230	$0.92	Check price
Levoit Vital 100	130 CFM	300 ft²	HEPA	23-50 dB	$120	$0.92	Check price
Blueair 3210	129 CFM	200 ft²	HEPASilent	18-48 dB	$120	$0.93	Check price
Levoit Core 200S	115 CFM	183 ft²	True HEPA	24-46 dB	$110	$0.96	Check price
Bissell air320	310 CFM	1,000 ft²	True HEPA	30-55 dB	$300	$0.97	Check price
Philips 3000i Series	270 CFM	830 ft²	HEPA	33-57 dB	$300	$1.11	Check price
Coway Airmega 250	293 CFM	930 ft²	True HEPA	22-49 dB	$330	$1.13	Check price
Coway Airmega 400	350 CFM	1,560 ft²	True HEPA	22-52 dB	$450	$1.29	Check price
Coway AP-1216L Storm	217 CFM	330 ft²	True HEPA	25-53 dB	$300	$1.38	Check price
Alen BreatheSmart 75i	347 CFM	1,300 ft²	True HEPA	25-49 dB	$500	$1.44	Check price
Honeywell HPA100	100 CFM	155 ft²	True HEPA	30-55 dB	$150	$1.5	Check price
Shark Air Purifier MAX	200 CFM	1,000 ft²	True HEPA	30-55 dB	$300	$1.5	Check price
Alen BreatheSmart 45i	245 CFM	800 ft²	True HEPA	24-49 dB	$430	$1.76	Check price
Rabbit Air MinusA2	200 CFM	815 ft²	BioGS HEPA	20-46 dB	$550	$2.75	Check price
Austin Air HealthMate HM400	250 CFM	1,500 ft²	True HEPA	50-66 dB	$720	$2.88	Check price
IQAir HealthPro Plus	300 CFM	1,125 ft²	HyperHEPA	22-59 dB	$900	$3	Check price
Dyson Purifier Cool TP07	130 CFM	360 ft²	H13 HEPA	24-50 dB	$550	$4.23	Check price
Dyson Purifier Hot+Cool HP07	130 CFM	360 ft²	H13 HEPA	24-50 dB	$650	$5	Check price

How the ranking works. The metric is cost per CADR (price divided by the dust CADR in CFM), lower is better, so you are paying the least for each unit of clean-air performance. CADR is the AHAM Clean Air Delivery Rate: higher clears a room faster. Room is the maker's rated coverage; a good rule is to pick a CADR at least two-thirds of your room's square footage. Filter: look for True HEPA or H13, which capture 99.97% of fine particles; treat HEPA-type as weaker. Sort by any column, and the lowest cost per CADR in your filter is highlighted as the value pick. Prices are USD, converted live to your currency; ongoing filter costs vary and are not included.

Common questions

What is CADR?

Clean Air Delivery Rate, in cubic feet per minute (CFM). The AHAM standard for how much filtered air a purifier delivers, higher means it cleans faster. Cost per CADR shows how much performance you get per dollar.

What CADR do I need?

The two-thirds rule: CADR in CFM should be at least two-thirds of your room area in sq ft. A 300 sq ft room wants around 200 CFM. Allergy sufferers should size up. Filter by room size to see suitable models.

Is HEPA worth it?

Yes. True HEPA or H13 captures 99.97% of particles to 0.3 microns, dust, pollen, dander, smoke. Avoid weaker HEPA-type filters. The filter grade is shown for each model.

Are pricey purifiers better value?

Usually not. Some premium units cost several times more per unit of clean air than proven mid-range models. Sort by cost per CADR to see the real winners, and check filter running costs too.