Quick Start Guide
Tools needed to install 
Enhanced Air Cleaner
Standard screwdriver
 Phillips screwdriver
 Metal cutter
 Drill
 Duct Sealant
Mounting the Media Air Cleaner
STEP ONE: Review the Installation Plan
Temporarily place the cabinet on the floor, oriented as it will be when installed. Insert and remove the cartridge to make sure the 
plan allows adequate clearance for easy removal and replacement of the cartridge.
STEP TWO: Fasten the Cabinet to the Furnace
a.  Align the cabinet with the return air opening. 
b.  Place blocks under the cabinet, as necessary, to make sure the unit sits securely. 
c.  Create an opening in the furnace to match the cabinet opening. 
d.  Attach the cabinet securely to the furnace. Attach the unit directly or fit a starting collar in the furnace opening. Either drill 
holes and fasten with sheetmetal screws or rivets, or use slip joints. If you are drilling holes, use a locking pliers to help hold 
the unit in place during drilling.
STEP THREE: Install Turning Vanes
Install turning vanes to help distribute air equally over the full surface of the upstream side of the media. Install them whenever 
an abrupt 90 degree elbow is installed directly against the media air cleaner cabinet.
STEP FOUR: Fasten Cabinet to Ductwork
Fasten side of cabinet to the ductwork using sheet-metal screws, rivets, or slip joints, as appropriate.
STEP FIVE: Connect Ductwork
a.  Connect the vertical duct section to the elbow. If the vertical drop of the duct is less than 7 in. (178 mm) from the side of the 
furnace, shorten the horizontal trunk or attach an offset fitting to the elbow. 
b.  When ductwork is properly aligned, connect the vertical duct to the horizontal trunk.
STEP SIX: Seal Joints
Seal all joints in the return air system between the media air filter and the furnace to prevent dust from entering the clean 
airstream.
Application Considerations
Air Conditioning: Mount the media air cleaner up-
stream of the evaporator coil in a cooling system.
Humidifiers: The media air cleaner is compatible 
with humidifiers. Avoid applications where water mist 
will reach the media. 
UV Lights: Germicidal UV lights can cause degrada-
tion of the media filter. The UV light should be located 
out of line of sight or a minimum of 3 feet from the 
filter.
Choosing a Mounting Position
The Media Air Cleaner mounts in any position within 
the return air duct, usually next to the furnace blower 
compartment, but the arrow on the cartridge must 
point in the same direction as the airflow.
NOTE:  The media air cleaner cabinet is sturdy 
enough to easily support the weight of the 
furnace and evaporator coil.
Important Installation Requirements
Personal Safety
•  Wear safety glasses while installing the unit.
•  Do not cut into any air conditioning or 
electrical line.
•  Follow professional safety standards and 
all local codes for plumbing, electrical, and 
mechanical considerations.
Failure to comply with these requirements 
will result in voided warranty, improper 
installation, and service callbacks.
M939C
Highboy furnace with side 
installation.
STEP SEVEN: Install Filter Cartridge
Slide the filter cartridge into the cabinet, making sure the arrow on the cartridge 
points in the direction of air flow. Replace access door. Insert the tab on the bottom 
of the door into the slot in the cabinet. Swing the door closed and press it into place.
Media Air Cleaners
QUICK START GUIDE
33-00240EF-03




