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not trapped by the replaceable Water Panel evaporator are
flushed down the drain. The drain also eliminates the problems
caused by stagnant water. This is the most effective and least
expensive method to dispose of trouble-causing minerals.
There are some homes where drain facilities are not accessi-
ble or available. For these situations, or where high water
hardness is not a problem, specially designed Aprilaire
Humidifiers, Models 448 and 445, are available, incorporating
a water recirculating system.
Capacity is high because an average-size home (10,000 cu. ft.)
requires the addition of approximately 9 gallons of water
per day to maintain
35% relative humidity when the outside
temperature is 20°. The smallest Aprilaire Humidifier under most
operating conditions, has this humidifying capacity. Trouble-
free performance and minimum maintenance are assured by
the design features of the Aprilaire Humidifier. All unit hous
ing
parts that come in contact with water are non-metal and will
never rust
or corrode. Neither heat nor water will affect them
under normal operating conditions.
The Water Panel evaporator, designed especially for uniform,
high evaporation, and the Scale Control Insert also efficiently
traps mineral deposits which are often the cause of damage to
working parts in ordinary humidifiers. No “white dust” can be
distributed throughout the living quarters. The Water Panel evap-
orator is the heart of the unit and must be in good condition to
assure high capacity trouble-free performance. It should be
changed annually.
The granular coating in the bottom of the distribution tray is
designed to provide equal distribution of the water to each of the
openings assuring an even flow of water over the Water Panel
evaporator. Do not clean the mineral scale off the bottom of the
water distribution tray at the end of the humidification season.
The scale itself provides an excellent track for the water to follow.
This is actually what we try to simulate with the synthetic coating
in the bottom of the tray. If the coating is removed, it is not necessary
to purchase a new distribution tray or upper housing. You can
accomplish the same uniform performance by applying a small
amount of liquid dishwashing detergent over the entire lower surface
of the water distribution tray. This will allow the water to flow
evenly through each of the openings, provided, of course, the
unit is level in order to achieve maximum capacity.
There are many humidifiers on the market. They all add
moisture . . . with varying degrees of efficiency. None, however,
can provide the features, design, and performance incorporated
into your Aprilaire Humidifier.