Replacement filters for Honeywell, Trion, and 1, 2 and 4 Inch Filters

Welcome to Furnace-Filters.com!

Buying furnace filters or replacement filters for an air handling unit can be an easy task, but watch out for filters that are too cheap or that don't meet your units specifications! Make sure that the filter you're buying meets your specifications, and when in doubt, go with a mid level MERV rating (MERV 8 or 11) and a high capacity air flow rating.


Some things to consider when comparing filters:


* Filter Pleats
(these are the V shapes of the filter media) are an easy visual indicator to compare surface area. Most of our 1, 2 and 4 inch filter images are of the standard capacity filters. The high capacity option, where available, increases the number of pleats in the filter media. Check our detailed specs page where available for more information on filter media surface area.

* The MERV rating along with the surface area of the filter media factor into the airflow capacity and the resistance of the filter. Check our detailed spec tabs on the product pages for these ratings. When comparing filter prices, these numbers (MERV, Airflow capacity, Initial resistance) really determine the comparability of different filters.


* You're always better off buying a higher capacity filter if the option is available. These filters offer a lower initial resistance and will make up for their extra cost in performance. To understand how this cost savings is achieved consider how a heating or cooling system works. Airflow across a heat exchanger transfers heat and the more airflow that moves across the exchanger the more heat is exchanged. In a gas furnace system this airflow is critical to the effectiveness, efficeincy and life expectancy of the system. The heat exchanger relies on airflow to keep the metal cool. Also, the more air that moves across the heat exchanger, the more heat that is removed, and the cooler the exhaust air is. Less airflow results in a higher exhaust temperature, which is waster energy and also a higher operating temperature on the heat exchanger which can reduce the life of the system.

* The Bottom line is that when it comes to an expensive heating or cooling system, the cheapest filter on the market isn't always the best option.

  • $68.00

    20x20x4 Filters - MERV 11 Multi-Pleat XL11™ Filters available in Standard Capacity or High Capacity Sold in case of 6 filters

    $68.00
  • $64.56

    14x25x1 Filter MERV 11 - Multi-Pleat XL11™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 11 Filters) SOLD AS A CASE OF 12 FILTERS

    $64.56
  • $94.00
    Sale!

    24x24x2 Air Filters manufactured by Koch Filters. MERV 8 efficiency available in High or Standard Capacity. Sold in cases of 12 Filters.  Learn more about Koch Filters Multiplete XL8 Filters Here

    $94.00
  • $96.00

    14x25x2 Multi-Pleat XL11™ Filters MERV 11 Extended Surface Pleated Panel Filters Made in the USA! Upgrade from standard pleated filters MERV 11 efficiency rating Offers dual-layered filter media, low pressure drop, superior efficiency and high dust holding capacity Sold as Case of 12 Filters

    $96.00
  • $69.60

    16x20x1 Filter - Multi-Pleat XL11™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 11 Filters) SOLD AS A CASE OF 12 FILTERS

    $69.60
  • $60.00

    Pleated MERV 8 16x25x1 filters manufactured by Koch Filter corporation. Made in the USA. Quality  filters at an affordable price! Our 16x25x1 filters are sold in case quantites of 12 filters. See more information on MULTI-PLEAT XL8™ FILTERS HERE

    $60.00
  • $54.00
    Sale!

    10x20x1 Replacement Filters MERV 8 filter rating available in standard and high capacity airflow ratings. Pricing is for a CASE OF 12 Filters

    $54.00
  • $67.20

    20x20x1 Filter MERV 11 - Multi-Pleat XL11™ manufactured by Koch Filter*Made in the USA! *20x20x1 Nominal Size*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 11 Filters) SOLD AS A CASE OF 12 FILTERS

    $67.20
  • $60.00
    Sale!

    14x25x2 Filter - Multi-Pleat XL8™ MERV 8 Extended Surface Pleated Panel Filters with Mechanical Media Made in the USA! Mechanical MERV 8 media is not reliant on electrostatic charge for efficiency - Low resistance to airflow - High Dust Holding Capacity - Sturdy double-wall frame design - Moisture resistant beverage board frame - Standard and High...

    $60.00
  • $68.00

    20x25x1 Filter - Multi-Pleat XL11™ Filters manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity filters available. *Pleated 20x25x1 Filters available in Standard or High Capacity ratings for lower resistance to airflow.   SOLD AS A CASE OF 12 AIR FILTERS (More info on MERV 11...

    $68.00
  • $60.00
    Sale!

    20x20x4 Multi-Pleat Multi-Pleat XL8™ Filter Available in Standard Capacity or High Capacity. Sold as a case of 6 filters.

    $60.00
  • $58.20
    Sale!

    14x20x1 Filter - Multi-Pleat XL8™MERV 8 Extended Surface Pleated Panel Filters with Mechanical MediaMade in the USA!Media isn't reliant on electrostatic charge for efficiency - Low resistance to airflow - Sturdy double-wall frame design - High Dust Holding Capacity - Moisture resistant beverage board frame - Standard or High Capacity models...

    $58.20
  • $63.60

    20x25x1 Furnace Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA! *High Dust Holding Capacity *Pleated 20x25x1 Furnace Filters available in Standard or High Capacity ratings for lower resistance to airflow.  (More info on our MERV 8 Pleated Filters by Koch Filter) SOLD AS A CASE OF 12 FILTERS

    $63.60
  • $64.56

    14x20x1 Filter - Multi-Pleat XL11™MERV 11 Extended Surface Pleated Panel Filters with Mechanical MediaMade in the USA!Media isn't reliant on electrostatic charge for efficiency - Low resistance to airflow - Sturdy double-wall frame design - High Dust Holding Capacity - Moisture resistant beverage board frame - Standard or High Capacity models...

    $64.56
  • $59.76

    14x25x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 8 Filters) SOLD AS A CASE OF 12 FILTERS

    $59.76
  • $58.20
    Sale!

    12x24x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available. SOLD AS A CASE OF 12 FILTERS

    $58.20
  • $67.20

    10x20x2 Filter - Multi-Pleat XL11™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available. *Pleated 10x20x2 Furnace Filters available in Standard or High Capacity ratings for lower resistance to airflow.   SOLD AS A CASE OF 12 FILTERS (More info on MERV 11...

    $67.20
  • $64.08

    14x25x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity models available.(More info on MERV 8 Filters) SOLD AS A CASE OF 12 FILTERS

    $64.08
  • $69.00

    20x24x1 Filter - Multi-Pleat XL8™ manufactured by Koch Filter*Made in the USA! *High Dust Holding Capacity *Pleated 20x24x1 Furnace Filters available in Standard or High Capacity ratings for lower resistance to airflow.  (More info on our MERV 8 Pleated Filters by Koch Filter) SOLD AS A CASE OF 12 FILTERS

    $69.00
  • $77.40

    24x24x1 Filter - Multi-Pleat XL11™ Filters manufactured by Koch Filter*Made in the USA!*Low resistance to airflow*High Dust Holding Capacity*Standard or High Capacity filters available. *Pleated 24x24x1 Filters available in Standard or High Capacity ratings for lower resistance to airflow.   SOLD AS A CASE OF 12 AIR FILTERS (More info on MERV 11...

    $77.40