Choosing the right 20x25x5 air conditioner filters is essential for maintaining efficient HVAC performance and improving indoor air quality. This article reviews top-quality filters designed to fit common AC and furnace units, helping you trap dust, allergens, and other particles effectively.
Product | Brand | Air Filter Rating | Quantity | Link |
---|---|---|---|---|
Filtrete MPR 1000, MERV 11 | Filtrete | MERV 11 | 2-Pack | View on Amazon |
Filterbuy MERV 8 Dust Defense | Filterbuy | MERV 8 | 2-Pack | View on Amazon |
Filterbuy MERV 11 Allergen Defense | Filterbuy | MERV 11 | 2-Pack | View on Amazon |
Filtrete MPR 700, MERV 8 | Filtrete | MERV 8 | 2-Pack | View on Amazon |
Filterbuy MERV 13 Optimal Defense | Filterbuy | MERV 13 | 4-Pack | View on Amazon |
Content Navigation
- Filtrete 20x25x5 AC Furnace Air Filter, MPR 1000, MERV 11
- Filterbuy 20x25x5 Air Filter MERV 8 Dust Defense (2-Pack)
- Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (2-Pack)
- Filtrete 20x25x5 AC Furnace Air Filter, MPR 700, MERV 8
- Filterbuy 20x25x5 Air Filter MERV 13 Optimal Defense (4-Pack)
- Buying Guide for 20x25x5 Air Conditioner Filters
Filtrete 20x25x5 AC Furnace Air Filter, MPR 1000, MERV 11

This Filtrete air filter features a precise dimension of 19.63 x 24.75 x 4.31 inches, designed specifically to fit Lennox brand media air cleaners. Its MPR 1000 and MERV 11 rating allow it to capture up to twice as many microparticles compared to standard filters.
The filter uses electrostatic cleaning technology, improving allergen defense and maintaining better indoor air quality. This 2-pack is intended for 12-month usage, combining durability with efficient particle trapping for dust, pollen, and pet dander.
Filterbuy 20x25x5 Air Filter MERV 8 Dust Defense (2-Pack)

The Filterbuy MERV 8 Dust Defense filters measure 19.88 x 24.75 x 4.38 inches and are compatible with HVAC systems like Honeywell FC100A1037 and Lennox X6673. This synthetic media filter traps 90% of dust particles while maintaining airflow.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
Its construction with 8 pleats per foot enhances particle capture efficiency and longevity, lasting three times longer than traditional fiberglass filters. Designed and manufactured in the USA, this 2-pack is ideal for protecting homes from mold, pollen, and other airborne particles.
Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (2-Pack)

This version from Filterbuy features a higher MERV 11 rating with a comparable MPR of 1000-1200, suitable for capturing up to 95% of dust particles. Measuring 19.88 x 24.75 x 4.38 inches, it fits many major HVAC brands including Carrier and Lennox.
Its electrostatically charged pleated design increases particle collection efficiency without reducing airflow. Recommended to replace every 90 days, this 2-pack balances allergen defense and system performance.
Filtrete 20x25x5 AC Furnace Air Filter, MPR 700, MERV 8

This Filtrete MERV 8 filter fits Trion Air Bear and Carrier units with actual dimensions of 19.56 x 24.13 x 4.75 inches. It is designed to reduce dust, pollen, and pet dander efficiently thanks to its MPR 700 rating.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
The two-pack setup supports extended use in common HVAC systems, maintaining good airflow and particle filtration for cleaner air circulation in your home.
Filterbuy 20x25x5 Air Filter MERV 13 Optimal Defense (4-Pack)

The Filterbuy MERV 13 Optimal Defense air filters provide the highest filtration among the reviewed products. With an MPR rating between 1500 and 1900 and 11 pleats per foot, these filters capture up to 98% of airborne particles, including bacteria.
Measuring 19.88 x 24.75 x 4.38 inches and designed for popular HVAC brands, this 4-pack is made in the USA and designed to last three times longer than fiberglass filters. Ideal for allergy sufferers seeking maximum defense against allergens and pollutants.
Buying Guide for 20x25x5 Air Conditioner Filters
Selecting the best air conditioner filter requires consideration of several critical factors to ensure optimal air quality and HVAC system function.
Filter Size and Fit
Confirm your AC or furnace requires a 20x25x5 size filter and check the exact dimensions since nominal sizes can vary slightly. Proper fit is crucial to avoid air bypass and maintain efficiency.
Filter Efficiency Ratings
MERV (Minimum Efficiency Reporting Value) ratings indicate filter performance. Filters rated between MERV 8 and MERV 13 are suitable for most residential use:
- MERV 8: Good for dust, pollen, and pet dander
- MERV 11: Better allergen and micro-particle capture
- MERV 13: High efficiency capturing bacteria and fine particles
Choose a rating balancing particle reduction with maintaining sufficient airflow to prevent system strain.
Filter Media Type
Filters with pleated synthetic media and electrostatic charge capture more particles than fiberglass. Pleats increase surface area, extending life and improving filtration efficiency.
Filter Lifespan and Replacement Frequency
Filters typically last from 1 to 3 months depending on quality and environmental conditions. Durable pleated filters may last longer, supporting cost-effectiveness and convenience.
Compatibility with HVAC Brands
Verify filter compatibility with your HVAC system manufacturer such as Honeywell, Lennox, Carrier, or Trion Air Bear for seamless installation and optimal performance.
Quantity and Value Packs
Consider multi-pack options for extended use at better value while ensuring proper storage to maintain filter integrity before use.