All filters are made in the USA + Free Shipping on orders over $50

Call Us C877.570.9755

21x27x5 Air Filter Merv 8 21x27x5 Air Filter Merv 8
21x27x5 AC Filter Merv 11 21x27x5 AC Filter Merv 11
21x27x5 Furnace Filter Merv 13 21x27x5 Furnace Filter Merv 13
21x27x5 Filter Merv 13 Titanium 21x27x5 Filter Merv 13 Titanium
21x27x5 Filter Merv 10 Carbon 21x27x5 Filter Merv 10 Carbon
21x27x5 Filter Merv 8 Carbon 21x27x5 Filter Merv 8 Carbon
Protects All Against
  • Pollen protection
  • Dust protection
  • Mold protection
  • Dust Mites protection
    Dust Mites
  • Bacteria protection
  • Pet Dander protection
    Pet Dander
  • Smoke protection
  • Viruses protection
  • Cooking Smoke protection
  • Odor protection
  • Smog protection
{{ filter_count }} Pack of

Trane 21x27x5 Air Filters

Replacement Filter

Actual Size: 20.7 X 26.2 X 5

1. Select Filter Quality


2. Select Quantity

${{ money(priceWithoutDiscount()) }} Save ${{ money(savePrice()) }} ({{ savePercent()}}%)


Product Description

Item Model Number: FKDPFT21X27X5AM11
21x27x5 (20.7 x 26.2 x 5) MERV 11 Filter King Replacement Filter for Trane BAYFTFR21M

Manufactured in the US

Why Buy Air Filters From Filter King?


In comparison to fiberglass filters, 21x27x5 pleated air filters are at least 20 times more effective. All Filter King air filters are made in the US.


Filters frames are made out of heat resistant paperboard with horizontal grid supports. Able to withstand temperatures of up to 200° F and resistant to moisture, the paperboard frames do not support microbial growth and outperforms traditional cardboard frames.


Chemical free, electrostatically charged synthetic polyester media is pleated, maximizing the surface area, to capture a high number of airborne particles as small as 0.3 microns with low air flow resistance. To increase durability, the media is supported with a corrosion resistant steel wire.

21x27x5 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 21x27x5 Air Filter?

Filter King AC & furnace filters aren’t the typical fiberglass filters that need to be replaced every 30 days. Our filters can typically be used for 3 to 5 months before requiring to be changed. Naturally, a variety of things influence filter lifespan.

Some of the factors that influence your filter’s life include outdoor air quality, whether pets are in the home, and how well your HVAC system is maintained.

Your air filter becomes clogged over time by trapped particles, preventing airflow. The efficiency of the HVAC filter declines. Your system must work harder to heat and cool your home. The extra strain on the HVAC system causes higher energy bills. Regular home air filter replacements can prevent expensive system repairs or replacements down the road.

You should change your filter more frequently if you notice:

  • Household dust build-up
  • The air isn’t cooling as is used to
  • There’s more dust near the air vents
  • A dirty filter surface
  • Higher energy bills
  • Burning smells near your HVAC system.

Trane BAYFTFR21M 21x27x5 Air Filter: About the Product

The Trane 21x27x5 air filter is reliable and long-lasting. Protect your home or business today. Find out more. 

Trane 21x27x5 Air Filter: Overview

The Trane 21x27x5 air filter is a replacement media filter that works to clean, cool, and condition the air in your home or business. The performance of your AC or furnace relies on the regular replacement of the air filter inside, and this economical, high capacity filter is ideal for your BAYFTFR21M furnace.

Filter King knows firsthand how busy home life can get, but replacing your air filters should never be pushed aside for later. Purchasing the Trane 21x27x5 whole house filter with our cost-effective subscription service will help you take control of your home’s air-quality.

The specially-designed Trane 21x27x5 air filter will protect you from airborne pollutants and contaminants including but not limited to dust, pollen, pet dander, smoke, bacteria, and other nasties. Regularly replacing your air filters will prevent blockages clogging up your AC or furnace too. 

The Trane 21x27x5 air filters are available in a range of MERV ratings. For the safest air filtration, always choose maximum protection.

Trane 21x27x5 Air Filter: Specifications

  • 2-12 Pack of Trane 21x27x5 air filters
  • Brand: Trane
  • Actual Size is 20.7x26x2.5
  • Manufactured in the U.S.A
  • 4 variations available: Standard (Merv Rating 8), Good (Merv Rating 11), Better (Merv Rating 13), or Odor Eliminating (Carbon Filters)

A Durable Filter

Trane air filters are designed and manufactured to be durable and long-lasting. Always be fully prepared by relying on our subscription service that delivers your replacements to your address on time, every time.

A Compatible Filter

This filter is guaranteed to fit any Trane BAYFTFR21M Filter or Trane BAYFTFR21M Furnace.

A Versatile Filter

Rest assured the Trane 21x27x5 air filter is suitable for both residential and commercial use. Filter King has you covered, no matter whether you’re a home-owner, business-owner, or pet-owner. 

Why Choose Filter King?

1. We Remember for You

You can sit back, relax, and never forget to change your filter. Order with our monthly subscription service today.

2. We Offer Unbeatable Prices

We reward your loyalty with unbeatable prices. The more you buy, the less you pay. 

3. Made in the U.S.A

All of our filters are proudly manufactured and assembled in the U.S.A. Share our pride by ordering with us.