LONGSTAR: 1 DOE certified model
LONGSTAR has one air purifier basic model certified to DOE as of 2026-11-03, rated smoke CADR 148 cfm. It's the same unit as a model filed under 1 other brand. How its efficiency compares with its DOE class is below.
Source: DOE Compliance Certification Database (air purifiers), data as of 2026-11-03.
As an Amazon Associate I earn from qualifying purchases.
Air purifiers
| # | Photo | Model | Labels | Smoke CADR, cfm | Room size | PM2.5 CADR | CADR/W | Brands | Amazon |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  | LONGSTAREP- |
| 148cfm, 229 sq ft | 229 sq ft | 154 | 6.2 | 2 | Check price on Amazon |
How efficient is the LONGSTAR EP-KJTS01-140-25W?
LONGSTAR EP-KJTS01-140-25W files CADR/W 6.2. The median among the 140 models in its DOE class (air purifiers, PM2.5 CADR 150+ cfm) is 5.5, so it's above the median: higher than 93 of the 140.
A higher CADR/W means more clean air per watt.
Who makes LONGSTAR 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.
Its one basic model is filed under LONGSTAR's own model number and sold by other brands too, so LONGSTAR is the filer of record for it.
LONGSTAR shares its basic model with one other brand, Maxlite.
| Basic model | LONGSTAR model | Number belongs to | Brands |
|---|---|---|---|
| EP- | EP- | LONGSTAR | 2 |
How much does a LONGSTAR air purifier cost to run?
For LONGSTAR EP-KJTS01-140-25W, DOE's record lists 144 kWh a year, the annual energy figure from DOE's test. That's about $26.15 a year.
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.
How does LONGSTAR EP-KJTS01-140-25W compare with other brands?
Picked by rule from models with a matched listing, DOE data as of 2026-11-03.
- Within 20 cfm of its size, highest CADR/W: Blueair 4512311000, 161 cfm. Room size 250 sq ft, CADR/W 8.6: about 28% less power for the same clean air.
- Nearest size in its class with a higher CADR/W: BOSCH Air 4000, 156 cfm. Room size 241 sq ft, CADR/W 7.7: about 19% less power for the same clean air.
- Nearest bigger unit: Sharp KC-850U, 169 cfm. Room size 262 sq ft, CADR/W 3.7.
Questions about LONGSTAR
- Is LONGSTAR a good air purifier brand?
- Its one air purifier basic model, LONGSTAR EP-KJTS01-140-25W, certifies 148 cfm, and its CADR/W of 6.2 is higher than 93 of the 140 in its DOE class (air purifiers, PM2.5 CADR 150+ cfm). It's the same unit as another brand's model. 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 LONGSTAR air purifiers rated for?
- DOE's effective room size for LONGSTAR EP-KJTS01-140-25W is 229 sq ft, from a certified smoke CADR 148 cfm. CADR and room size.
- Is LONGSTAR the same as Maxlite?
- For one unit, yes: both file it under the same DOE basic model (EP-KJTS01-140-25W). Compare the 2 brands of EP-KJTS01-140-25W.