Honeywell THM5421C1008 Automatic Or Manual Changeover, 4H/2C

Product Features

• Advanced dual-fuel control.
• Three wires to the living space allows for easy equipment upgrade without having to run additional thermostat wire.
• Thermostat connects with Equipment Interface Module or EnviraZONE panel to control temperature, humidification, dehumidification and ventilation from a single point in the home.
• Automatically raises humidity levels throughout all rooms in the home, moisturizing air to prevent symptoms of dryness and to protect hardwood flooring and woodwork.
• Removes air pollutants by exchanging the stale air in a house with fresh, filtered air better than having an open window.