Lennox X6675 20x25x5 MERV 16 Filter Guide: OEM vs Compatible Options
🎯 Quick Facts: Lennox X6675 Filter
- Nominal Size: 20" × 25" × 5"
- Actual Size: 19-7/8" × 24-7/8" × 4-3/8"
- MERV Rating: 16 (Hospital-grade filtration)
- Efficiency: 95% for particles 3+ microns
- Compatible Models: HCC20-28, HCF20-16
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Why the Lennox X6675 MERV 16 Filter is the Gold Standard for Indoor Air Quality
The Lennox X6675 Healthy Climate MERV 16 filter represents the pinnacle of residential air filtration technology. With hospital-grade MERV 16 efficiency, this filter captures up to 95% of particles as small as 3 microns, including:
- ✓ Dust mites and pet dander
- ✓ Mold spores and bacteria
- ✓ Smoke and smog particles
- ✓ Virus carriers and bioaerosols
- ✓ Pollen and other allergens
X6675 Filter Specifications & Compatibility
| Specification | Details |
|---|---|
| Model Number | X6675 (Also known as HCF20-16) |
| Nominal Size | 20" × 25" × 5" |
| Actual Size | 19-7/8" × 24-7/8" × 4-3/8" |
| MERV Rating | MERV 16 / CADR 1900 |
| Lennox Models | HCC20-28, Healthy Climate Systems |
| Replaces Bryant/Carrier | EXPXXFIL0020, EXPXXUNV0020, EXPXXLMC0020, FILCCCAR0020 |
| Replaces Honeywell | FC35A1027, FC100A1037, FC200E1037 |
| Replaces Trion Air Bear | 255649-102, 229990-002, 229990-102 |
Choose Your Best Option: OEM vs Compatible
Genuine OEM X6675
- ✓ Original Lennox quality
- ✓ Factory-certified performance
- ✓ Consumer Reports #1 rated
- ✓ Full warranty coverage
Atomic Compatible X6675
- ✓ Same MERV 16 efficiency
- ✓ Exact-fit dimensions
- ✓ Significant cost savings
- ✓ Made in USA quality
Complete Lennox MERV 16 Filter Family
The X6675 is part of Lennox's premium MERV 16 Healthy Climate collection. Here's the complete lineup with sizes:
| Model | Nominal Size | Actual Size | Shop Options |
|---|---|---|---|
| X6672 | 16" × 25" × 5" | 15-7/8" × 24-7/8" × 4-3/8" | OEM | Compatible |
| X6675 | 20" × 25" × 5" | 19-7/8" × 24-7/8" × 4-3/8" | OEM | Compatible |
| X6669 | 21" × 26" × 4" | 20-3/4" × 25-3/4" × 3-3/4" | OEM | Compatible |
| X7935 | 20" × 20" × 5" | 19-3/4" × 19-7/8" × 4-3/8" | OEM | Compatible |
| X8788 | 20" × 26" × 5" | 20" × 25-1/2" × 4-3/8" | OEM 2-Pack | Compatible |
| X8789 | 17" × 26" × 5" | 16.31" × 25.47" × 4.31" | OEM 2-Pack | Compatible |
| X8790 | 20" × 21" × 5" | 20" × 20-5/8" × 4-3/8" | OEM | Compatible |
MERV 16 Maintenance Kits Including X6675
Several Lennox PureAir maintenance kits include MERV 16 filters. Here are the kits that may include the X6675 or related models:
- X8795 - Includes X8788 MERV 16 filter, PCO insert X8791, and 2 UV lamps
- X8796 - Includes X8789 MERV 16 filter, PCO insert X8792, and 2 UV lamps
- X8797 - Includes X8790 MERV 16 filter, PCO insert X8793, and 2 UV lamps
- X8347 - Includes X6666 MERV 16 filter, catalyst insert, and 4 UV lamps
Installation & Maintenance Tips
Lennox filter installed in HVAC cabinet - Note the model number location
⚠️ Important Installation Notes:
- Verify actual dimensions before ordering - measure your existing filter
- Check airflow arrow - install with arrow pointing toward blower
- Note installation date - write it on the filter frame
- MERV 16 requires adequate airflow - ensure your system can handle high-efficiency filtration
- Replace every 6-12 months or when pressure drop exceeds manufacturer specifications
Why Choose MERV 16 for Your Home?
The X6675 MERV 16 filter offers the highest level of residential air filtration available without requiring a full HEPA system. This makes it ideal for:
Asthma, allergies, or respiratory sensitivities
Infants, elderly, or immunocompromised
High pollution, wildfire smoke, or construction dust
Multiple pets or severe pet allergies
Frequently Asked Questions
What does HCF20-16 mean?
HCF20-16 is the replacement filter part number for the Lennox X6675. HCF stands for "Healthy Climate Filter," 20 refers to the nominal width, and 16 indicates the MERV rating.
Can I use X6675 to replace other brand filters?
Yes! The X6675 directly replaces Honeywell FC100A1037/FC200E1037, Bryant/Carrier EXPXXFIL0020, and Trion Air Bear 255649-102. Just verify the actual dimensions match: 19-7/8" × 24-7/8" × 4-3/8".
How often should I change my X6675 filter?
MERV 16 filters typically need replacement every 6-12 months, depending on usage, air quality, and household conditions. Check monthly and replace when visibly dirty or when your system indicates high pressure drop.
Is MERV 16 too restrictive for my system?
MERV 16 filters do create more airflow resistance than lower-rated filters. Ensure your HVAC system is properly sized and maintained. If you experience reduced airflow or system strain, consider MERV 11 or 13 alternatives.
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