Real size: 15 1/2" X 19 1/2" X 3 5/8" 


This is our 16x20x4 Aerostar air filter for forced air furnaces that is manufactured and solidly-built by Dafco Filtration. It is available in two different filtration capacities: the ULTRA which has a MERV 8 filtration capacity and the MAXI which has a MERV 11 filtration capacity. To know more about MERV classifications, read the following article.


Specifications of the 16x20x4 furnace air filter


This 16x20x4 filter has been tested according to the procedure described in appendix "J" of the ASHRAE 52.2 standards. The media (filter material) is contained in a water-resistant solid die-cut case made from 100% recycled fibers. The housing thus prevents the filter from deforming, cracking or bending during normal use. The diagonal members of the case are glued to the media to provide greater rigidity and maintain the desired space between the folds. The cardboard case is made of two pieces and is glued to the media all around the perimeter. A metal grid is glued to the media to maintain the folds and provide greater stability. Integral ply separators provide additional stabilization for the most demanding applications.


Lifespan of the 16x20x4 filter and maintenance.


Our 16x20x4 furnace air filter has an average lifespan of 4 to 6 months. We recommend checking the condition of the air filter after 3 months of use. The filter serves to protect the inner coil of your heating system. A furnace air filter that is not replaced regularly will allow the accumulation of dust and dirt on the inner coil that can cause premature corrosion. A clogged coil becomes less efficient which in turn increases your heating and cooling operating costs.


An air filter left in place when its lifespan is reached that becomes clogged will also cause a lot of air restriction. This air restriction will affect the performance of your system by making it work longer to maintain the desired temperature, thereby increasing your operating costs while unnecessarily forcing your fan motor.


For all these reasons, we recommend that you check and replace the air filter in your furnace on a regular basis.


16x20x4 air filter advantages.


The 16x20x4 air filter is a pleated type air filter. This filter has more material than a flat filter, thereby increasing its lifespan. Heavier and more restrictive particles accumulate at the bottom of the folds, letting the sides be effective longer. The deeper the folds, the longer the lifespan of the air filter.


This furnace air filter can be used for residential, commercial or industrial use.



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M8LE16204-6 This filter is a MERV 8 and was tested according to the procedure described in append..



M11ME16204-6 This filter is a MERV 11 and was tested according to the procedure described in appe..