Honeywell Home RTH221B Programmable Thermostat Review
Key Takeaways
- One-week programming with four periods per day.
- Precise temperature control within +/- 1°F.
- Easy installation and operation.
- Built-in battery change reminders.
- Compatible with various heating and cooling systems.
The Honeywell Home RTH221B1039 1-Week Programmable Thermostat is designed to simplify your climate control experience. With an intuitive interface and precise temperature control, this thermostat ensures that your home remains comfortable throughout the week. Its easy installation and user-friendly programming make it an excellent choice for anyone looking to enhance their home's efficiency.
This thermostat is perfect for managing heating and cooling systems without auxiliary heat options, making it a versatile addition to your home. For more options, check out our Programmable Thermostats category.
About Honeywell Home RTH221B1039
The Honeywell Home RTH221B1039 1-Week Programmable Thermostat is a user-friendly device that combines functionality with modern design. Built with high-quality plastic, this thermostat is not only aesthetically pleasing but also durable enough to withstand daily use. Its compact dimensions of 1"D x 4.75"W x 3.5"H make it a convenient fit for most wall spaces.

Key Features
- One-Week Programming: Set a consistent schedule with one identical program for the entire week, allowing for four program periods per day, including wake, leave, arrive, and sleep.
- Precise Temperature Control: Maintain comfort with a temperature accuracy of +/- 1 degree Fahrenheit, ensuring that your space is always at the perfect temperature.
- Digital Display: The easy-to-read digital display features an intuitive interface for quick access to setpoint temperature adjustments.
- Easy Installation: Designed for DIY enthusiasts, this thermostat can be installed with minimal effort, making it suitable for homeowners who prefer to handle their own home improvements.
- Built-in Reminders: Stay on top of maintenance with battery change reminders; it requires two AAA batteries for operation.
- Set Point Retention: In the event of a power outage, your set point is retained in memory, ensuring you won’t have to start from scratch.
- Display Options: Choose between Fahrenheit or Celsius, as well as a 12 or 24-hour clock format, to customize the display to your preference.
- Override Options: The thermostat offers both permanent and temporary override capabilities, allowing you to adjust settings as needed.
- Compatibility: This device works with various heating, cooling, and heat pump systems without auxiliary heat options. However, it does not support electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling systems. It is designed for indoor use only.
Performance and Usability
The performance of the Honeywell Home RTH221B1039 is commendable, providing efficient heating and cooling control for your home. Its programmable nature allows you to customize the thermostat according to your daily routine, ensuring energy efficiency and comfort. The straightforward user interface and installation process make this thermostat particularly appealing for beginners or those not well-versed in home technology.
Best Use Cases
- Ideal for families who have a consistent weekly schedule.
- Great for individuals or couples who value energy efficiency.
- Perfect for those who prefer a simple, easy-to-use thermostat without complex features.

Overall, the Honeywell Home RTH221B1039 1-Week Programmable Thermostat is a smart investment for anyone looking to enhance their home's climate control. For additional options in this category, visit our Smart Thermostats page.
Check Current PriceAdvantages and Disadvantages
Pros
- One-week programming allows for consistent temperature control with four periods per day.
- Precise temperature control within +/- 1°F ensures comfort in your living space.
- Easy installation and user-friendly interface make it accessible for all homeowners.
- Built-in battery change reminders help maintain functionality without hassle.
- Compatible with various heating and cooling systems, increasing versatility.
Cons
- Not compatible with electric baseboard heat or multi-stage systems.
- Lacks a backlit display, which may make it hard to read in low light.
- Limited programming options compared to more advanced models.
Overall, the Honeywell Home RTH221B1039 1-Week Programmable Thermostat offers a solid mix of features and usability, making it a great investment for anyone looking to improve their home's climate control while keeping ease of use in mind.
Wrapping Up Your Smart Thermostat Journey
When considering the Honeywell Home RTH221B1039 1-Week Programmable Thermostat, it's essential to keep a few tips in mind to make the best purchasing decision:
Tips for Buyers
- Compatibility: Ensure the thermostat is compatible with your heating and cooling system.
- Ease of Installation: Look for models that offer straightforward installation, especially if you're a DIY enthusiast.
- Features: Consider what features are most important for your lifestyle, such as programming options and display preferences.
- Read Reviews: Always check customer feedback to gauge real-life performance and usability.
- Energy Efficiency: Opt for thermostats that help save energy and reduce utility bills.
In summary, the Honeywell Home RTH221B1039 delivers excellent benefits, including:
- One-week programming for consistent temperature management.
- Precise temperature control ensuring comfort.
- User-friendly interface and installation.
However, potential drawbacks include limitations with certain heating systems and the absence of a backlit display.
Overall, if you're seeking a reliable and straightforward thermostat that offers ease of use and energy efficiency, the Honeywell Home RTH221B1039 is a solid choice. It effectively balances features and usability, making it an excellent addition to your home. For more options, consider exploring our Smart Thermostats category.
Check Current PriceYour Burning Questions About the Honeywell Home RTH221B1039
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Q: Can I program the thermostat for just weekdays?
A: The Honeywell RTH221B allows for one identical program for the entire week, which means you cannot set different schedules for weekdays and weekends.
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Q: Does it require Wi-Fi to operate?
A: No, this thermostat does not require Wi-Fi. It is a standalone device that operates independently without a network connection.
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Q: How easy is it to install?
A: The thermostat is designed for easy installation, and most users can set it up themselves without professional help.
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Q: What happens during a power outage?
A: The RTH221B retains your set point in memory during power outages, so you won’t have to reprogram it once power is restored.
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Q: Can I use it with electric baseboard heating?
A: No, this thermostat is not compatible with electric baseboard heat or multi-stage heating/cooling systems.