United Filter
20x25x5 MERV 11 - Lennox X6673 Replacement Filter - Case of 1
$38.00
- 🚚 Free shipping ✨
- 🔄 30-day hassle-free returns 😊
- 📆 Usually ships within 1-2 business days ⚡
Nominal Size: 20 x 25 x 5
Actual Size: 19-7/8 x 24-7/8 x 4-3/8
Part #: UFH-52025M11-1
MERV : 11
Case: 1
Price: $49.99
Manufactured: Canada
*Effective for dust, pollen, pet dander, bacteria and mould.
Also Fits or Replaces:
| Brand | Air Cleaner | Filter Part # |
|---|---|---|
| APRILAIRE | 2200 |
|
| HONEYWELL | F25A1068 F25F1067 F35F1024 F100F1038 F150E1034 F200E1037 |
FC35A1027 FC100A1037 FC200E1037 F35Expandapac |
| LENNOX | HCC20-28 BMAC-20C X6661 X4560 EAC-17-20* EAC-17-20-1* |
X6673 X0586 X5426 X6675 X8304 X8307 X8310 |
| DAFCO | 1015871 1016690 1027581 1028452 |
|
| BEST AIR | 52025 PR8 5-2025-PR11 |
|
| CARRIER | EZXCAB020 |
FILCCCAR0120 FILXXCAR0120 |
| SPACEGUARD | 2200 |
|
| GENERALAIRE | 4356 |
|
| CLEAN COMFORT | AMP-11-2025-4H |
|
| GOODMAN | AMP-11-2025-4H |
|
| AMANA | AMP-11-2025-4H |
|
| ELECTRO-AIR | MFH-2025-4 | |
| COLEMAN | S1-WHM10202505C |
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Air Filter Quality Rating Chart
When choosing the quality of air conditioning filter, consideration should be given to both the air pollution sources in your home as well as any allergy concerns your family may face.
| 
| 
| Customer Favorite! 
| 
|
|---|---|---|---|---|
| Economy Filtration | Basic Allergy + Dust | High Allergy + Dust | Severe Allergy | |
| Merv Rating | 8 | 11 | 13 | Commercial |
| Filter Effectiveness |
Up To 35% |
Up To 65% |
Up To 90% |
Up To 95% |
| Dust & Dust Mites | ✓ | ✓ | ✓ | ✓ |
| Pollen | ✓ | ✓ | ✓ | ✓ |
| Pet Dander | ✓ | ✓ | ✓ | ✓ |
| Mold Spores | ✓ | ✓ | ✓ | ✓ |
| Smoke | ✓ | ✓ | ✓ | ✓ |
| Fungus | – | ✓ | ✓ | ✓ |
| Viruses & Bacteria | – | – | ✓ | ✓ |
| Odor Reduction | – | – | – | ✓ |
How To Choose an Air Filter
Wondering which air filter is right for you? Our easy-to-use filter comparison chart will help you figure out the best filter for your home. The higher the MERV Rating of the air filter you select, the more dust, allergens and irritants will be filtered out of your air. If you have pets and family members with asthma or allergies, you should select a higher quality filter. Additionally, if you live in a dusty or highly polluted area, you will want a filter that most effectively cleans your home's air. Indoor air pollution can be greatly reduced by selecting a higher quality air filter, which will effectively filter up to 95% of common pollution sources in the air your family breathes.
👉 Economy:
Our Economy furnace filter removes up to 35% of dust, dust mites, pollen, pet dander, mold and smoke from your air.
👉 Good:
Our Good furnace filter removes up to 65% of dust, dust mites, pollen, pet dander, mold, smoke and fungus from your air.
👉 Better:
Our Better furnace filter removes up to 90% of dust, dust mites, pollen, pet dander, mold, smoke, fungus and bacteria from your air.
👉 Best:
Our Best furnace filter removes up to 95% of dust, dust mites, pollen, pet dander, mold, smoke, fungus and even odors from your air.
WHO WE ARE UNITED FILTER
Proudly Canadian, United Filter delivers high-quality air filtration solutions for homes, businesses, and institutions. With a focus on performance, value, and sustainability, we’re trusted by HVAC professionals across North America.
❓Frequently Asked Questions
📢 The frequency of air filter replacement depends on several factors, such as filter type, indoor air quality, household size, and whether you have pets. In general, it is recommended to replace standard 1-inch filters every 1 to 3 months. High-efficiency filters may last longer, up to 6 to 12 months.
📢 High-efficiency air filters, such as HEPA filters, can remove smaller particles and allergens. They are worth it if you or your family members suffer from allergies, asthma, or respiratory issues. However, they can also put additional strain on HVAC systems not designed for them.
📢 MERV (Minimum Efficiency Reporting Value) is a rating system for air filters that ranges from 1 to 16. Higher MERV ratings indicate better filtration. HEPA (High-Efficiency Particulate Air) filters are a specific type of high-efficiency filter that can capture at least 99.97% of particles as small as 0.3 microns.
📢 Some air filters are designed to help with odors by incorporating activated carbon layers that absorb volatile organic compounds (VOCs) and other odor-causing particles. Standard particulate filters generally won't address odors.
📢 To choose the right air filter, consider factors such as the size of the filter required by your HVAC system, desired MERV rating, any specific allergies or health concerns, and whether odor control is important. Also, ensure that the filter won't overly restrict airflow for your HVAC system.