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The H1008A,D Automatic Humidity Controls with HumidiCalc+™ Software are duct mounted and provide automatic, low voltage, electronic control of by-pass flow- through, powered flow-through, steam and drum humidifiers in central heating systems. The H1008D also controls heat/energy recovery units and dehumidifiers. The H1008A,D are designed to automatically adjust the humidity level based on indoor temperature and humidity, inferred or measured outdoor temperature and the setting of the frost factor dial.

The frost factor setting is used to maintain a comfortable humidity level in the home while reducing moisture condensation on inside windows. The HumidiCalc+™ Software infers the outdoor temperature by monitoring the equipment cycles and eliminates the need for an outdoor temperature sensor when used on single-stage gas or oil furnaces. With the use of the C7089H Outdoor Temperature Sensor (purchased separately), the H1008A,D also provide automatic humidity control in heat pump and multi-stage systems.

The thermostat can be set for four times and up to eight temperatures for each day of the week (28 independent time and 56 temperature settings). The s and t keys provide quick temporary temperature changes to increase your comfort. The Hold Temp key provides energy efficient operation for extended periods of time.

Deluxe Programmable Thermostat Features:
• Program up to four time periods and temperature setpoints for each daily schedule.
• Set different schedules for each day of the week.
• Backlit for easy readability of display when a key is pressed.
• Press Information key for present setting information and outdoor temperature (select models).
• Select fan operation for each period of each day (select models with fan key).
• Temporarily set the temperature warmer or cooler.
• Daylight Time key for easy switching in and out of Daylight Savings Time.
• Program end of Hold (1 to 255 days) for added comfort and energy savings.
• Copy key for easier programming.