Which air purifiers actually earn their price — ranked by CADR per dollar

Data study · air-purifiers

We divided each purifier's AHAM-verified smoke CADR by its current price to find which ones actually move air for the money. Five units, all measured the same way — no estimates blended in. The order reshuffles the usual "premium equals better" assumption. Want the quietest pick for a bedroom instead? See [air purifiers by clean air per decibel](/lp/air-purifier-cadr-per-decibel).

Smoke CADR per dollar (CFM/$)

Higher = better

Levoit Core 600S

1.37 CFM/$

Blueair Blue Pure 211i Max

1.37 CFM/$

Coway Airmega AP-1512HH

1.34 CFM/$

Blueair Blue Pure 311 Auto

1.09 CFM/$

Levoit Core 300S

1.08 CFM/$

The two large-room units tie for the lead: the Levoit Core 600S and Blueair 211i Max both push 410 CFM of smoke CADR for $299.99 — about 1.37 CFM per dollar — and cover ~635 sq ft. The 211i Max edges it on quiet, 23 dB at its floor versus the Levoit's 26.

Under $200, the Coway AP-1512HH is the efficiency standout: 233 CFM for $173 (1.34 CFM/$), within a hair of the $300 units' value at half the coverage. For rooms up to ~360 sq ft it's the smartest dollar on this list.

More money, less air: the Blueair 311 Auto runs $229 but moves only 1.09 CFM per dollar — below the cheaper Coway. You're paying for the auto sensor and the Scandinavian look, not throughput.

Cheapest isn't best value: the Levoit Core 300S has the lowest sticker ($130) yet lands last at 1.08 CFM/$ and covers just ~219 sq ft — a fine bedroom unit, not a deal.

Best-to-worst value spread is 26%, so sizing the unit to your room matters more than spending up.

#	Product	Smoke CADR per dollar	numerator	price	coverage_sqft	score	Tier
1	Levoit Core 600S	1.37	410	$300	635	8.60	Best
2	Blueair Blue Pure 211i Max	1.37	410	$300	635	8.90	Best
3	Coway Airmega AP-1512HH	1.34	233	$173	361	8.80	Top
4	Blueair Blue Pure 311 Auto	1.09	250	$229	388	8.70	Mid
5	Levoit Core 300S	1.08	141	$130	219	8.50	Skip

Levoit Core 600SBest

1.37 CFM/$

$300· num: 410

Blueair Blue Pure 211i MaxBest

1.37 CFM/$

$300· num: 410

Coway Airmega AP-1512HHTop

1.34 CFM/$

$173· num: 233

Blueair Blue Pure 311 AutoMid

Methodology

Smoke CADR per dollar = AHAM-verified smoke CADR ÷ current price; higher is better. Every row uses an AHAM-sourced smoke CADR so the comparison stays apples-to-apples — models we only have independent PM1 test data for are held out rather than blended in, and anything without a verified figure is excluded, not guessed.

Smoke CADR per dollar
AHAM smoke CADR (CFM)
Current price

Sources:AHAM Verifide smoke-CADR ratings · Manufacturer specifications · Current retailer pricing

As of 2026-06-26 · Prices change. We resync daily; tap a product for the live offer.