Aprilaire 448 owner manual Relative Humidity Guide, Outdoor Temperature ºF Setting Dial

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(Table 2) % Relative Humidity Guide

 

 

 

Outdoor Temperature (ºF)

 

 

 

-10

0

10

20

30

40

 

1

10

10

10

15

20

25

 

2

10

10

15

20

25

30

Setting

3

10

15

20

25

30

35

4

15

20

25

30

35

40

Dial

5

20

25

30

35

40

45

 

 

6

25

30

35

40

45

45

 

7

30

35

40

45

45

45

As an example, if the outdoor temperature is 20º F, and, following step 3, the humidifier turns off at “5” on the dial range, then the RH in your home is 35%.

Manual Mode:

(Automatic Mode – see pg 3)

Your Aprilaire Humidifier Control is installed in the cold air return. It is important to anticipate a drop in outdoor temperature and reduce the setting accordingly to avoid excessive condensation. For exam- ple, with an outdoor temperature of 20° the correct setting will be 35% relative humidity. If the temperature is expected to fall to 0° that evening, then merely reduce the setting to 25% several hours prior to the temperature change.

The recommended settings on the humidistat are based on years of research (see table 3) and experience as to what is best for the average home. These settings represent a compromise between RH levels that would be most desirable for comfort reasons and humidity levels that are suitable for protection of your home and to avoid condensation on your windows. For example, a wintertime indoor RH of 50% may be considered ideal, but unfortu- nately, it probably would result in damage to your home. Observance of the recommended RH levels on your humidistat, therefore, is an important safeguard. Condensation of water on inside windows in the form of fogging or frost is usually an indica- tion of too high relative humidities. This same condensation can take place in other areas in your home with the possibility of dam- age resulting.

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Contents Automatic Humidifier Introduction Principle of Operation Page Operation Guide Automatic Mode Manual Mode-see pgFigure a % Relative Humidity Guide Outdoor Temperature ºF Setting DialFigure B III. Effect of Water Characteristics IV. Annual Maintenance Inspection and Service Instructions For ModelMaintenance Instructions For Models Reservoir Pump Sections Models Model Model Limited Warranty Aprilaire Fresh Air Exchangers Electronic Thermostats Aprilaire Zone Control SystemsService and Water Panel Replacement Record DP #10005406

448 specifications

The Aprilaire 448 is a state-of-the-art humidifier that plays a significant role in maintaining optimal indoor air quality. Designed specifically for homes, this unit effectively combats dryness, ensuring that the air within your living space remains comfortable and healthy, especially during the colder months.

One of the standout features of the Aprilaire 448 is its robust capacity to cover areas up to 4,000 square feet. This means that even larger homes can benefit from improved humidity levels, protecting not just your comfort but also your furnishings and overall air quality. By maintaining an ideal humidity level between 30% and 50%, the Aprilaire 448 fosters an environment that reduces the risk of respiratory issues, allergies, and dry skin.

The unit incorporates advanced technology to facilitate easy operation and maintenance. Equipped with a digital control, it allows homeowners to set and monitor humidity levels effortlessly. The digital display provides crucial data on current humidity levels, enabling users to make informed adjustments. Additionally, the unit features a built-in humidistat that automatically regulates the humidity based on the settings, ensuring a consistent and comfortable atmosphere.

Energy efficiency is another hallmark of the Aprilaire 448. The unit is designed to function quietly, avoiding disruptions in your daily life, while using minimal energy compared to traditional humidifiers. The water-saving design ensures that it operates effectively without excessive water consumption, making it an eco-friendly choice for conscientious homeowners.

The Aprilaire 448 also boasts a self-cleaning feature that reduces maintenance time and effort. This innovation helps to keep the unit free from mineral buildup, which is a common problem in humidifiers, thereby prolonging its lifespan and reliability. Furthermore, the easy-to-replace water panel ensures that users can maintain their humidifier with minimal hassle.

In summary, the Aprilaire 448 is a powerful and efficient solution for maintaining ideal humidity levels in larger spaces. With its advanced digital controls, energy-efficient operation, and low-maintenance design, it has become a preferred choice for homeowners seeking to enhance their indoor air quality. Whether combating the winter chill or addressing dryness during any season, the Aprilaire 448 delivers comfort and health benefits all year round. Its commitment to reliability and performance makes it a wise investment for any household.
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