Honeywell RTH6400D 5-1-1-Day Programmable Thermostat

Meet a smart, straightforward way to manage your home's comfort. The Honeywell RTH6400D offers 5-1-1 day programming with four program periods per day, making it easy to tailor heating and cooling to your routine.

• Programmable schedule: 5-1-1 day programming with 4 program periods per day to match your weekly routine.
• Large backlit display: Clear, easy-to-read screen with menu-driven programming that shows both room and set temperatures.
• Soft-key controls: Simple, tactile buttons for intuitive navigation and quick adjustments.
• Exclusive Smart Response technology: Learns and adapts to your heating and cooling needs for more precise comfort timing.
• Filter change reminder: Alerts you when it's time to check or replace your air filter to maintain efficiency.
• Wide compatibility: Works with most electric, gas, and oil single-stage furnaces, heat pumps without backup heat, heat-only, and cool-only systems. Will not operate with electric baseboard heat.
• Temperature precision: Maintains setpoint with +/- 1°F accuracy for steady comfort.
• Auto changeover: Automatically switches between heat and cool to align with your programmed times.
• Energy efficiency: ENERGY STAR rated and battery powered for reliable performance and efficient operation.
• Compact design: Approx. 3.75 in H x 6 in W x 1.25 in D with an off-white plastic finish for a discreet, wall-mounted installation.

Enjoy consistent comfort and potential energy savings with a straightforward thermostat that integrates into most cooling and heating setups. The RTH6400D combines easy setup, reliable temperature control, and practical reminders, so you stay comfortable without constant adjustments.