Priestley: 3 DOE certified models
Priestley has 3 air purifier basic models certified to DOE as of 2026-11-03, rated smoke CADR 31 to 195 cfm. How their efficiency compares with their DOE class is below.
Key findings
- Highest certified smoke CADR among its air purifiers: Priestley P360 at 195 cfm.
Source: DOE Compliance Certification Database (air purifiers), data as of 2026-11-03.
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Air purifiers
| # | Photo | Model | Labels | Smoke CADR, cfm | Room size | PM2.5 CADR | CADR/W | Brands | Amazon |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  | PriestleyP360 |
| 195cfm, 302 sq ft | 302 sq ft | 198 | 5.1 | 1 | Check price on Amazon |
| 2 |  | PriestleyP066 |
| 31cfm, 47 sq ft | 47 sq ft | 32 | 3 | 1 | Check price on Amazon |
| 3 | PriestleyP280 |
| 135cfm, 209 sq ft | 209 sq ft | 139 | 5.2 | 1 |
How efficient are Priestley air purifiers?
Of the 3 Priestley air purifiers, 1 files a higher CADR/W than the class median and 2 fall below it.
| DOE class | Priestley models | Above median | Class median | Best Priestley |
|---|---|---|---|---|
| Air purifiers, PM2.5 CADR 10 to 99 cfm (90) | 1 | 0 | CADR/W 3.5 | P066 CADR/W 3 |
| Air purifiers, PM2.5 CADR 100 to 149 cfm (66) | 1 | 1 | CADR/W 4.65 | P280 CADR/W 5.2 |
| Air purifiers, PM2.5 CADR 150+ cfm (140) | 1 | 0 | CADR/W 5.5 | P360 CADR/W 5.1 |
A higher CADR/W means more clean air per watt.
Who makes Priestley air purifiers?
DOE's database has no manufacturer field, so the evidence is whose model number each unit is filed under and which other brands file the same unit.
None of the 3 Priestley basic models is filed by another brand as of 2026-11-03, and none uses another company's model number. DOE's records tie them to Priestley alone.
How much does a Priestley air purifier cost to run?
DOE's annual energy figures for the 3 Priestley air purifiers that file one run from 56 to 224 kWh a year: about $10.17 to $40.68 a year. The lowest is Priestley P066 (31 cfm, CADR/W 3) and the highest Priestley P360 (195 cfm, CADR/W 5.1).
At 18.16¢ per kWh, the US average residential price for August 2026 (EIA Electric Power Monthly, table 5.6.A). Worked out from the certified figures.
Questions about Priestley
- Is Priestley a good air purifier brand?
- How its 3 air purifiers compare on efficiency with their DOE class is above. All 3 are filed under Priestley alone. We don't test reliability, noise or build quality, so we can't rank brands on those. How we compare models.
- What room size are Priestley air purifiers rated for?
- DOE's effective room size for its 3 rated models is 47 to 302 sq ft, from a certified smoke CADR 31 to 195 cfm. CADR and room size.
- Which Priestley air purifier is the most efficient for its size?
- Priestley P280, at CADR/W 5.2: higher than 36 of the 66 in its DOE class (air purifiers, PM2.5 CADR 100 to 149 cfm). At the other end is Priestley P066, at CADR/W 3, higher than 29 of the 90 in its class.