Honeywell Air Filter High-Efficiency TRN2121R1/E, 21x21.5x5 - Merv 10
- MERV 10 Rating - Up to 20 Times More Efficient Than Typical 5 Inch Pleated Filter.
- Fits Trane or American Standard Perfect Fit.
- Captures High Percentage of Household Airborne Particles, Including Microscopic Particles You Can't See.
- Consumer No Longer Has To Wait For HVAC Rep To Replace Filter.
- Lasts Up To Six Months.
- Replacement filter for BAYFTAH21M.
- Actual Dimensions (Inches): 20.75 x 20 x 5
MERV = 'Minimum Efficiency Reporting Value' this is used to rate the overall effectiveness of an Air Filter. Below you will find a table that measures the MERV strength and tells you the Application of each unit's effectiveness. In general an Air Filter with a higher MERV Rating is more effective and has a broader application, but most residential homes will find the best use from an air filter between the 5-12 MERV rating.
| MERV RATING | MIN. PARTICLE SIZE | TYPICAL CONTROLLED CONTAMINANT | TYPICAL APPLICATIONS |
| 1 - 4 | > 10.0 Micrometers | Pollen, dust mites, cockroach debris, sanding dust, spray paint dust, textile fibers, carpet fibers | Residential window AC units |
| 5 - 8 | 10.0 - 3.0 Micrometers | Mold, spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix | Better residential, general commercial, industrial workspaces |
| 9 - 12 | 3.0 - 1.0 Micrometers | Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets | Superior residential, better commercial, hospital laboratories |
| 13 - 16 | 1.0 - 0.3 Micrometers | Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments | Hospital & general surgery |
| 17 - 20 | < 0.3 Micrometers | Virus, carbon dust, sea salt, smoke | Electronics & pharmaceutical manufacturing cleanroom |
Related Products
Honeywell TRN2121R1/E 5 Inch High Efficiency Air Cleaner Filter 21x21.5x5 Reviews
I was very pleased with both the product and service of Honeywell
Excellent service and delivery time was great. Appreciate all who work to put this item together and send out for customer. Great job guys & gals.
Item was on backlog and Honeywell kept us updated as to shipping. Filter fit the bill...and was much worth the wait. Thank you for superior item.
decided to try on my trane- glad I did. will use honeywell from now on, works great