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The Aprilaire 2120 has been discontinued.
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(800) 865-5931

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The high-density filter unit is attached to your heating or cooling system, where it captures pollutants from conditioned air before it is distributed to the rooms of your home. 99% efficient at removing particles 1/100th the thickness of a human hair (1 micron) on a single pass. The Aprilaire® Media Air Cleaner is silent and low maintenance. It utilizes a simple, remarkably effective HEPA-type filtering media that actually improves its particulate-capturing capability the longer it is used. For particles larger than five microns, efficiency reaches 99%.

Select an air cleaner with dimensions that most closely match your furnace's or air handler's dimensions where the air cleaner will be installed. Most air cleaners attach to a furnace's side, or air handler's bottom or top (depending which is the air inlet). Therefore, select an air cleaner with a length that does not exceed a furnace's depth, or air handler's air-inlet dimensions. (Viewing an upright furnace or air handler from the side, depth is considered the space from left to right.) View online spec sheets for dimensions of furnaces and air handlers sold here.

Your order will also include Alpine's exclusive installation video on DVD! Watch as a pro tackles the project from start to finish. You'll have all your questions answered as you see how easy it is to install yourself.

Also available is Alpine's Sheet Metal Transition Kit (AHA081). This kit allows you to adapt your existing return air plenum so you can fit in a new air cleaner, if you don't already have the space. Instructional video also shows you how to use the kit to make your air cleaner installation go smoothly. You can view the kit here.

Included in the Aprilaire 2120 Box:
  • (1) Aprilaire 2120 Case
  • (1) Media Filter
  • (1) Installation Manual
  • (1) Owner's Manual
Minimum Efficiency Reporting Value

Rating system created for air filters with a scale that represents the worst case performance of a filter when dealing with particles in the range of 0.3 to 10 micrometers. The scale is from 1-16. The higher the MERV rating the greater the percentage of particles that will be captured.

Minimum Efficiency Reporting Value
Rated Air Flow
1200 CFM
Inlet Opening Dimensions
21 3/16W x 19 3/4H inches
Outlet Opening Dimensions
21 15/16W x 19 3/4H inches
26 7/8 Inches
10 Inches
22 1/16 Inches
Limited Warranty
5 Years