User Guide
F50F AND F300E ELECTRONIC AIR CLEANERS
69-0756—05 12 
How the electronic air cleaner works
First, large particles (lint, hair) are caught by the prefilter(s). Then, as the dirty air 
passes through the intense high voltage electric field surrounding the ionizer wires, all 
particles, even the smallest particles down to 0.3 micron are given an electric 
charge.The air then passes into the collector where the alternate parallel plates are 
charged positive and negative, creating a uniform electrostatic field. Since opposites 
attract, the charged particles stick to the collector plates, having an opposite electric 
charge.The precharged postfilter continues to remove small particles from the air. The 
air leaving the air cleaner contains very few particles.
Each time the air circulates through the heating/air conditioning system and air 
cleaner, more particles are removed. These particles are generated by normal 
household activities and also enter the house from outside. That is the reason we 
recommend that you use the air cleaner as much as possible.
Electronic air cleaner vs standard furnace filter
The regular furnace filter collects mainly large, visible particles that reach the filter. Its 
main purpose is to protect the furnace and air conditioner blower. The electronic air 
cleaner collects these large particles plus many of the smaller, mostly invisible 
particles. Its purpose is to reduce indoor air pollution as well as to protect the blower, 
air conditioning coils and heat exchanger.
CELL
PREFILTER
IONIZER WIRES
(CHARGING
SECTION)
COLLECTOR PLATES
(COLLECTOR SECTION)
CLEANER
AIR
OUT
DIRTY
AIR
IN
M6030A
POSTFILTER 










