Flanders EZ-Flow vs Nordic Pure MERV 12
Bottom line
In our scoring the Nordic Pure MERV 12 wins at 5.9/10 against the Flanders EZ-Flow's 3.0/10, and for most homes it is not a close call: it costs roughly $53 a year less and captures particles the fiberglass filter was never built to catch. Credit where it is due, the EZ-Flow labels itself honestly (both score 8.0/10 on rating honesty) and it is the cheapest thing on the shelf at $7.67 a filter. But its job is protecting the furnace, not cleaning your air, and AAF says so with a MERV 1 rating. In our view the only case for it is a system that genuinely cannot tolerate more resistance, and even then the monthly cadence makes it the pricier habit.
This is the comparison where the cheap filter turns out not to be the cheap one. The Flanders EZ-Flow II is the spun-glass throwaway stacked by the register at $7.67, but it is meant to be changed monthly, which works out to about $92 a year. The Nordic Pure pleated filter is $9.67 and lasts about three months, roughly $39 a year. On what they catch, they are not close: AAF's own product page rates the EZ-Flow at MERV 1, enough to keep lint and coarse dust out of the equipment, while the Nordic Pure is a true MERV 12 that also catches fine dust, pollen, and pet dander. The 'up to MERV 4' figure some dealers cite for the EZ-Flow is a dust-loaded marketing ceiling rather than a tested clean-filter rating, so we score the MERV 1 that AAF itself publishes.
| MERV 1 | True MERV (ANSI/ASHRAE 52.2) | MERV 12 |
| 0.0 | Verified Filtration30% | 5.0 |
| 2.5 | Total Cost of Ownership25% | 8.0 |
| 8.0 | Rating Honesty20% | 8.0 |
| 4.0 | Airflow Fit15% | 4.0 |
| 2.0 | Practical Fit10% | 2.0 |
FAQ
- Is the Flanders EZ-Flow II Fiberglass (throwaway) better than the Nordic Pure MERV 12 (1-inch)?
- In our scoring the Nordic Pure MERV 12 (1-inch) rates 5.9/10 and the Flanders EZ-Flow II Fiberglass (throwaway) 3.0/10. In our scoring the Nordic Pure MERV 12 wins at 5.9/10 against the Flanders EZ-Flow's 3.0/10, and for most homes it is not a close call: it costs roughly $53 a year less and captures particles the fiberglass filter was never built to catch. Credit where it is due, the EZ-Flow labels itself honestly (both score 8.0/10 on rating honesty) and it is the cheapest thing on the shelf at $7.67 a filter. But its job is protecting the furnace, not cleaning your air, and AAF says so with a MERV 1 rating. In our view the only case for it is a system that genuinely cannot tolerate more resistance, and even then the monthly cadence makes it the pricier habit.
- Is a fiberglass filter cheaper?
- Per filter, yes. Per year, no. The EZ-Flow is $7.67 but changed monthly, about $92 a year; the Nordic Pure pleated is $9.67 changed quarterly, about $39 a year. That is the whole point of scoring annual cost rather than shelf price.
- Does a fiberglass filter clean the air?
- Not in the way a pleated filter does. AAF rates the EZ-Flow at MERV 1, which is coarse-particle capture aimed at keeping lint and dust off the blower and coil. If you want fine dust, pollen, and pet dander taken out of the air, that is what the MERV 12 rating on the Nordic Pure describes.
- Do I really have to change a fiberglass filter monthly?
- That is the cadence its rated life assumes, and it is what drives the cost. We compute annual cost as per-filter price times replacements per year: twelve changes for the EZ-Flow against four for the pleated Nordic Pure. Stretch either one and you are trading airflow for savings.