MA-15 CADR: a small-room unit, not an upgrade inferred from its name
The exact MA-15 record reports 71 cfm smoke CADR, 79 cfm dust CADR and 88 cfm pollen CADR, with a reported area of 110 ft². Our calculated coverage at 4.8 equivalent air changes per hour and an 8 ft ceiling is 110.9 ft². The calculation does not replace the reported area.
The MA-14 record reports 75 cfm smoke CADR and 116 ft². The MA-15’s higher model number does not imply more certified clean-air delivery: this MA-15 record reports less smoke CADR. This compares the exact certification records, not build quality, noise or every retail revision. Read the MA-14 evidence analysis.
Does the MA-15 fit a 150 ft² bedroom?
At 150 ft² and an 8 ft ceiling, this record falls short of a 4.8 eACH scenario. It still filters air; it simply delivers fewer equivalent air changes relative to that room volume.
| Area | Ceiling | Required CADR at 4.8 eACH | Delivered eACH |
|---|---|---|---|
| 100 ft² | 8 ft | 64.0 cfm | 5.33 |
| 100 ft² | 9 ft | 72.0 cfm | 4.73 |
| 110 ft² | 8 ft | 70.4 cfm | 4.84 |
| 110 ft² | 9 ft | 79.2 cfm | 4.30 |
| 150 ft² | 8 ft | 96.0 cfm | 3.55 |
| 150 ft² | 9 ft | 108.0 cfm | 3.16 |
Small wattage is not the same as high efficiency
Medify MA-15 reports 4.77 smoke cfm/W, compared with a median of 5.22 cfm/W across 14 other certification records within ±15% of its smoke CADR. A low-power unit can use little electricity because it delivers less clean air. CADR per watt is the more useful efficiency comparison.
Inspect the 14-record cohort
- Aeocky Cybertraon · 74 cfm · 4.63 cfm/W · ID 4513918
- Afloia Kilo · 79 cfm · 5.41 cfm/W · ID 4515858
- Blueair 3131000100 · 80 cfm · 10.81 cfm/W · ID 4510117
- Bosch Air 1000 · 65 cfm · 4.78 cfm/W · ID 4009456
- Byzeng APH200-22J · 70 cfm · 4.61 cfm/W · ID 4528797
- Clorox Type AP40 · 79 cfm · 5.27 cfm/W · ID 4005671
- COWAY AIRMEGA, COWAY, Coway Airmega 50 · 67 cfm · 5.88 cfm/W · ID 4009116
- Honeywell HPA120*** · 71 cfm · 5.82 cfm/W · ID 4528713
- Honeywell HPA125** · 71 cfm · 5.82 cfm/W · ID 4576657
- Ikea E1916 · 63 cfm · 4.23 cfm/W · ID 4587248
- MEDIFY AIR MA-14 · 75 cfm · 5.17 cfm/W · ID 4437397
- MegaLight AP88-DTS-WT · 70 cfm · 4.61 cfm/W · ID 4528798
- MoreLite MLRAP-2000W · 64 cfm · 10.32 cfm/W · ID 4429394
- WOZOYO Pure Air PA2 · 75 cfm · 4.78 cfm/W · ID 4577050
Electricity: reported annual energy versus constant-power use
The source reports 88 kWh/year, equivalent to $14.08/year at an illustrative $0.16/kWh. This is not a 24/7 operating claim.
A separate scenario at the snapshot’s 14.9 W derived power for 24 hours every day gives 130.5 kWh/year, or $20.88/year at that rate. Derived watts are rounded in the snapshot and are not independently measured. Actual speed, controls and runtime can change consumption; purchase and filters are excluded.
Estimate electricity for your usageEvidence and limits
Snapshot retrieved 2026-10-20; certified 2025-12-03; exact model MA-15, ID 4517791. PureAirIndex analyzes certification data and has not personally tested this purifier. Noise, quieter-speed CADR, current retail claims, prices and filter costs remain unverified. No sleep-speed or health outcome is inferred.
Coverage and eACH use smoke CADR, room volume and the stated ceiling. Cohorts exclude this ID with inclusive, unrounded ±15% bounds; certification records are not product-family deduplicated. Cohort medians describe this snapshot, not the entire market.