Filterbuy 21x27x5 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement for Trane Perfect Fit & American Standard, 4-Pack
Filterbuy 21x27x5 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement for Trane Perfect Fit & American Standard, 4-Pack
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Filterbuy 21x27x5 Air Filter MERV 11 Allergy Defense, Pleated HVAC AC Furnace Filter Replacement for Trane Perfect Fit & American Standard, 4-Pack

|20.8K ratings

Key item features

  • WHOLE HOUSE REPLACEMENT: 21x27x5 air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 20.56" x 26.13" x 4.97")
  • MERV 11 PERFORMANCE: Protect your home or business from allergens, pets, and more with MERV 11 synthetic media (comparable with MPR 1200 & FPR 7) that captures 95% of dust without restricting air flow
  • LONG-LASTING FILTRATION: Electrostatically charged media (made in the USA) with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
  • SUPERIOR CONSTRUCTION: Easy installation beverage board (recyclable) frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
  • COMPATIBLE MODELS: Trane Perfect Fit (BAYFTFR21M), American Standard (FLR06070)
Current price is $247.96
Price when purchased online
  • Free shipping
  • Free 30-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $247.96
Your usuals, on your schedule
Save time and stay stocked!
One-time purchase $247.96

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Arrives by Fri, Aug 28
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Sold and shipped by FilterbuyPro Seller
4.592815707273538 out of 5 stars
4.592815707273538 stars out of 5, based on 4482 seller reviews(4.6)
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4.6 out of 5 stars
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20.8K ratings7,016 reviews
How item rating is calculated
  1. 5 stars82% (17.1K)
  2. 4 stars8% (1,767)
  3. 3 stars3% (689)
  4. 2 stars2% (381)
  5. 1 star4% (898)
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Showing 1-3 of 7,016 reviews

Jul 7, 2026
Reviewer name: Customer
Sold byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Great Filter

I have been using Filterbuy filters for numerous years and change them out regularly. I have always been pleased with just how good of a filter they are compared to other filters that do not even compare in quality. The price is very reasonable so that is why I always purchase 12 filters at a time and I received them within 2 days of ordering. I will continue using Filterbuy so I do not have to worry about my filters being great!

Review from Filterbuy
Helpful?6VIR17X0DYHX421497084
Jun 28, 2026
Reviewer name: Customer
Sold byFilterbuy
5 out of 5 stars
5 out of 5 stars review

I always get really good

I always get really good service from Filter Buy. The filters are of high quality and work very well, I changed the filters approximately every 3 months and the system seems to work out really well. Thank you for a very high quality product. Thank you Mike

Review from Filterbuy
Helpful?6VIR17X0DYHX421497084
Jul 6, 2026
Reviewer name: Customer
Sold byFilterbuy
5 out of 5 stars
5 out of 5 stars review

Great filter

The filter is so solid. I previously bought this flimsy filter that bowed immediately and got sucked up into the HVAC unit. After that terrible experience, I had to find a better option. This filter is excellent—well constructed and filtering out inpurities.

Review from Filterbuy
Helpful?6VIR17X0DYHX421497084