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There are some homes where drain facilities are not accessible
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 temper-
ature is 20°. The smallest Aprilaire Humidifier under most operating
conditions, has this humidifying capacity. Trouble-free perfor-
mance and minimum maintenance are assured by the design fea-
tures of the Aprilaire Humidifier. All unit housing 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 con-
ditions.
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 evaporator 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 evap-
orator. 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 actu-
ally 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 dish-
washing detergent over the entire inside surface of the water distribu-
tion 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.