Outside Temperature Recommended RH | American Standard 300A, 500A

To check the humidifier’s operation, note the current setting and set the Automatic Humidifier Control to the test mode when the furnace blower motor is operating. Water will flow into the humidifier for 1 minute and then it will turn off. This insures the unit is operating properly. Do not leave the control in the test mode as it will not operate. Reset the control to it’s original setting.

Model HUMD200A with Manual Mode:

(Automatic Humidifier Control – see pg 3)

Your new Humidifier is controlled by a humidifier control installed either in the living area (typically near the thermostat) or 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 example, with an outdoor temperature of 20°F the correct setting will be 35% relative humidity. If the temperature is expected to fall to 0°F that evening, then merely reduce the setting to 25% several hours prior to the temperature change.

The recommended settings on the humidifier control 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. For example, a wintertime indoor RH of 50% may be considered ideal by some, but unfortunately, 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 indication of too high relative humidities. This same condensation can take place in other areas in your home with the possibility of damage resulting.

TABLE 3 – Outdoor-Indoor Relative Humidity

Outside Temperature	Recommended RH
+40°F	45%
+30°F	40%
+20°F	35%
+10°F	30%
0°F	25%
– 10°F	20%
– 20°F	15%

The humidistat is a precision instrument that can be used to determine the RH accurately in your home during the winter. Turn the dial to the lower setting, then reverse the dial direction slowly until a “click” is heard. At this point, read the RH on the dial. This will be very close to the actual RH in your home.

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200A, 300A, 500A specifications

The American Standard 500A, 300A, and 200A series are highly regarded heating and cooling systems known for their efficiency, reliability, and innovative technology. These models are designed to provide optimal comfort while also emphasizing energy savings, making them ideal for residential HVAC applications.

The American Standard 500A is a top-tier model in the lineup, featuring advanced variable-speed compressors that allow for precise temperature control and quieter operation. This system utilizes the latest in inverter technology, enhancing energy efficiency by adjusting the compressor speed according to the home’s cooling needs. The 500A is also equipped with a high SEER (Seasonal Energy Efficiency Ratio) rating, showcasing its ability to reduce energy consumption and lower utility bills. Additional features include a durable, corrosion-resistant cabinet that extends the lifespan of the unit and ensures reliable performance in various weather conditions.

Moving down the line, the American Standard 300A series offers a blend of performance and affordability. This model features a two-stage compressor that balances comfort with energy efficiency. With a mid-range SEER rating, the 300A is adept at meeting household cooling demands while providing savings on energy bills. It incorporates a quiet operation design, making it suitable for use in residential areas. The 300A also employs a multi-position installation option, allowing for flexibility in placement and making it easy to integrate into existing HVAC systems.

The entry-level option, the American Standard 200A, is designed for budget-conscious consumers who still seek reliability and comfort. This model features a single-stage compressor, making it a straightforward and easy-to-use option. The 200A, while less complex than its higher-end counterparts, still delivers solid performance and decent energy efficiency. Its construction is robust, ensuring longevity and dependable service even in challenging weather conditions. The 200A is particularly favored by homeowners looking for a no-frills solution without sacrificing quality.

All three models in the American Standard series are designed with user-friendly controls and smart technology compatibility, allowing homeowners to maintain efficient climate control easily. Whether it's the advanced features of the 500A, the balanced performance of the 300A or the straightforward design of the 200A, American Standard provides a range of options to meet diverse heating and cooling needs, making them a go-to choice for many American households.