Aprilaire 4400 ユーザーズマニュアル

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PERFORMANCE
FIGURE 1
A whole-house air cleaner, like the Aprilaire model 4200 
or 4400, is installed by your heating and air conditioning 
contractor as one of the components in your heating and 
cooling system. It cleans the air that circulates through your 
home (see Figure 1).
When the heating or cooling equipment turns on, the air in 
your home travels through the registers and return duct(s) to 
the heating and cooling equipment where it is conditioned 
and sent back into the rooms of your house through the supply 
ducts. Small particles from numerous sources are suspended 
in your home’s air, just as they are suspended in the air 
outdoors. The largest of these particles will eventually come 
to rest and appear as dust. Smaller particles may come to rest, 
but with even the slightest disturbance will re-suspend into 
the air. These particles are very small, and come from natural 
sources such as dust and pollen and from manmade sources 
such as tobacco smoke or exhaust. The air cleaner is installed 
on or near the furnace/air handler and removes the particles 
that travel with the air that circulates through your heating 
and cooling system. Removing these particles keeps the 
equipment components clean and more importantly removes 
particles from the air you breathe. Particles are measured in 
microns, which is a unit of measure used for very small things 
(1 micron = 1/25,400 inch). For reference, the diameter of a 
human hair is approximately 100 microns. Figure 2 shows the 
size of various particles that can be found in the air.
Your model 4200 or 4400 with genuine Aprilaire SelfSeal
 
filters is a highly efficient air cleaner. The removal efficiency 
defines the percent of particles entering the air cleaner that 
are trapped (see Table 1).
Until now, the air cleaner has been a passive component of 
your heating and cooling system; when the equipment turned 
on to heat or cool your home, the air cleaner was doing its job 
whether you were aware of it or not. Your thermostat turns on 
your heating and cooling equipment and so, essentially, the 
thermostat determined when you clean your air. Your model 
4200 or 4400 air cleaner comes with an exclusive Air Cleaner 
Control that allows you to clean your air when you want! Not 
only does the Air Cleaner Control allow you to actively clean 
the air, it will show you when the air cleaner is filtering the air 
and when it is time to change the filter.
Common Pollutants
Particle sizes in microns
*
 
(1 micron = 1/25,400 inch)
*American Society of Heating, Refrigeration and Air Conditioning Engineering Guide
0.01
0.1
1
POLLENS & SPORES
SMUDGING
DUST
SMOKE
AIRBORNE BACTERIA
5
10
50
100
FIGURE 2
90-1148
TABLE 1 – Particle Removal Efficiency
Particle Size (microns)
Removal Efficiency
1
76%
3
93%
5
91%
7
93%
10
97%
3