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Honeywell TRN2121R1/E 5-Inch High Efficiency Air Cleaner Filter, 21-Inch by 21.5-Inch by 5-Inch

4.4 out of 5 stars 32 customer reviews

Price: $39.99 & FREE Shipping on orders over $49. Details
Only 3 left in stock (more on the way).
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21-Inch by 21.5-Inch by 5-Inch
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  • 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; Actual Size 20.2 by 20.1 by 4.9
  • Lasts Up To Six Months
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$39.99 & FREE Shipping on orders over $49. Details Only 3 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.


Product Description

Size: 21-Inch by 21.5-Inch by 5-Inch

Product Description

You can improve the air quality in your home with Honeywell's whole-house air cleaner filters. Today's tightly-built homes trap dust, allergens and more, which explains why poor indoor air quality ranks among the top five environmental risks to public health. The Honeywell 5 Inch Ultra Efficiency Air Cleaning Filter features a Merv 10 Rating that is up to 20 times more efficient than typical 5 inch pleated filter. It lasts up to 6 months and captures a high percentage of household airborne particles, including microscopic particles that you can't see. These filters are easy to install and sizes are available to fit all Honeywell plus Trane or American Standard Perfect Fit models.

From the Manufacturer

High Efficiency Air Cleaner Filter for Trane or American Standard Perfect Fit; Merv 10 Rating that is up to 20 times more efficient than typical 5-Inch pleated filter; Lasts up to 6 months; Captures High Percentage of household airborne particles, including microscopic particles that you can't see; Consumer no longer has to wait for the HVAC rep to replace the filter.

Product Information

Size:21-Inch by 21.5-Inch by 5-Inch

Technical Details

Part Number TRN2121R1/E
Item Weight 2 pounds
Product Dimensions 5 x 21 x 21 inches
Item model number TRN2121R1/E
Size 21-Inch by 21.5-Inch by 5-Inch
Item Package Quantity 1
Minimum Efficiency Reporting Values (MERV) 10
Batteries Required? No

Additional Information

ASIN B0043M5ULK
Customer Reviews
4.4 out of 5 stars 32 customer reviews

4.4 out of 5 stars
Best Sellers Rank #125,937 in Home Improvements (See top 100)
#1,110 in Home & Kitchen > Heating, Cooling & Air Quality > Air Purifiers > Parts & Accessories
Shipping Weight 2.2 pounds (View shipping rates and policies)
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available October 4, 2010

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 27-Inch by 17.5-Inch by 5-Inch Verified Purchase
Unlike the slightly more expensive 17.5x27x5 Trane Perfect Fit BAYFTFR17M air filter replacements case of 2, this Honeywell filter doesn't have the strip of foam around its outside that prevents air from leaking around the edges. The fit seems to be OK on the sides, but there's a full 1/2" gap at the front that air can flow around. See the uploaded picture for a visual comparison of the two products.

However, stuffing some paper or other blocker into the gap would be a reasonable workaround.

One note about installation, notice that only one of the sides is sloped. This is to accommodate the asymmetry of the enclosure (in my Trane unit there's a metal stub on the left side). If it doesn't fit one way, try turning it around.

Regarding the quality of the filter itself, I don't have enough information to compare it to other products, but at least check out the MERV rating they claim.
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Size: 27-Inch by 14.5-Inch by 5-Inch Verified Purchase
I got the 27x14.5x5 version to replace a Trane Perfect Fit BAYFTFREXM2 filter. This one works just fine as a replacement. This filter has its own cardboard cage which doesn't fit inside the black plastic frame part of the original filter, so just set the frame aside and use this filter just as it is. It fits very close to perfectly and I couldn't detect any significant amount of air leakage around the edges once it was installed.

No idea how the filtration or lifetime compares to the original yet.
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Size: 21-Inch by 21.5-Inch by 5-Inch Verified Purchase
To begin, this filter is impossible to find in a store. It must be a niche product because neither Home Depot or Lowe's carries it in-store. Thus I began my search online. Both Home Depot and Lowe's have this item online, but you will be paying a higher price (by about $15 at the time of this writing) for the EXACT SAME PRODUCT.

Basically, if you need this filter, which you probably do if you are reading this, then stop your search and get it here. I looked for over an hour (for a filter this thing is pretty expensive, I figured it HAD to be cheaper somewhere else). You will not find a better deal, and this is the ONLY filter that will fit your system.
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Size: 27-Inch by 17.5-Inch by 5-Inch Verified Purchase
good price and value you can not buy these from a wholesaler or a retail store they do not stock they or only sell to contractors. Just installed one in my furnace box and now have an extra for the future.
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Size: 27-Inch by 17.5-Inch by 5-Inch Verified Purchase
I like the thickness, and it is a perfect fit in my Trane system.
I will buy this one again.
Best price I found at the time.
It does not have a plastic frame around the outside, but I don't think that is necessary at all.
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Size: 27-Inch by 17.5-Inch by 5-Inch Verified Purchase
The filter itself seems to be a good value. It's hard to tell if it is any worse than the Trane OEM filters I've used.
The filter did not quite fit into the filter cabinet. There is a small recessed lip on the edge that the OEM filters have that this does not have, thus some negotiation was required. In the process, my hand pressed against the very sharp wires that add structure to the filter. Please use caution if you buy this filter; the wires are very, very sharp. So sharp you won't feel them when you get cut, you'll just see blood and wonder what happened (unless of course you've read this review, then you will know why,but wonder how you did not retain the knowledge herewith provided). Hey Honeywell - how about a warning label!

All in all the filter is a good value, much cheaper than OEM. I will purchase this again, but probably wear gloves when installing.
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Size: 21-Inch by 26-Inch by 5-Inch Verified Purchase
Perfect fit. Good price. Trane has odd sizes which makes filters harder to find and more expensive. These are a perfect fit at a reasonable price.
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Size: 27-Inch by 17.5-Inch by 5-Inch Verified Purchase
Would give 5 stars but its a box with fibbers in to help keep my furnace and air clean. Not much to get excited about. It came when they said it would, it fit, it looked just like the old one (except cleaner) and took seconds to replace.
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