Heating your home efficiently without sacrificing comfort is a top priority for most homeowners, especially with rising energy costs. A gas furnace paired with the right programmable thermostat can cut bills, reduce waste, and maintain consistent indoor temperatures—yet many struggle with complex setups, incompatible models, or thermostats that don’t deliver on promised savings. Choosing the wrong unit can lead to poor performance, frustrating programming, or even system damage.
We analyzed over 50 programmable thermostats, focusing on compatibility, ease of use, energy-saving potential, and real-world feedback to identify the best programmable thermostat for gas furnace systems. Our top picks balance smart features like learning algorithms and remote access with reliable operation, clear interfaces, and straightforward installation—whether you have a single-stage or multi-stage furnace. Keep reading to discover the best thermostat to optimize your home’s heating efficiency and comfort.
Best Options at a Glance
Honeywell RTH6580WF Wi-Fi Thermostat
Best Overall
- Honeywell Home/Total Connect Comfort
- Alexa/Google Assistant/Cortana
- DIY with C-wire required
- ENERGY STAR Certified
- Forced air/Heat pump/Steam
Honeywell RTH8560D Touchscreen Thermostat
Best Touchscreen Display
- Programmable
- Battery/Hard-wire
- Touchscreen/Backlit
- 7-Day Programmable
- Heat Pump/Furnace
Honeywell RTH6360D Programmable Thermostat
Best Budget Smart Features
- 5-2 Day
- Backlit LCD
- Smart Response
- Memory Retention
- Heat Pump/Forced Air
Honeywell RTH7600D Touchscreen Thermostat
Best Value Touchscreen
- Backlit touchscreen
- 7-Day, 4 periods
- Heat pump, furnace, central AC
- Smart Response Technology
- Home/Away mode
Multi-Stage Programmable Thermostat 2H/2C
Best for Multi-Stage Systems
- Multi-Stage, 2 Heat/2 Cool
- White Backlight LCD
- Universal sub-base
- 7-day, 5/1/1
- Forced air, Heat pump (no aux)
Suuwer 5-1-1 Programmable Thermostat
Best Budget Non-WiFi
- 1H/1C Single-Stage
- 5-1-1 Day
- 24VAC or 2 AAA
- +/-1°F
- Backlit Digital
Honeywell RTH221B 1-Week Thermostat
Best Simple Programming
- 1-week identical
- \”\+\/- 1\”\u00b0F
- Digital non-backlit
- Self-install easy
- Heating\/cooling heat pumps
Best Programmable Thermostat For Gas Furnace Review
How to Choose the Right Programmable Thermostat for a Gas Furnace
Choosing the right programmable thermostat can significantly impact your home’s comfort and energy bills. Here’s a breakdown of key features to consider when selecting a thermostat for a gas furnace:
Compatibility with Your System
The most crucial factor is ensuring the thermostat is compatible with your existing gas furnace setup. Most programmable thermostats work with standard forced-air systems (gas, oil, or electric), hot water, and steam. However, compatibility isn’t universal. Specifically, avoid thermostats that don’t work with electric baseboard heat (120-240V) if you have that system. Multi-stage furnaces require thermostats specifically designed to handle them (like the Multi-Stage Programmable Thermostat 2H/2C), while simpler systems work with basic 1H/1C models. Always double-check the thermostat’s specifications and your furnace’s documentation before purchasing. Failing to do so can result in a non-functional thermostat or, worse, damage to your furnace.
Programming Flexibility & Features
Programmable thermostats offer varying levels of scheduling control. Consider your lifestyle and how much customization you need.
- 5-2 Day Programming: (like the Honeywell RTH6360D) offers separate schedules for weekdays and weekends, a good balance for many households.
- 7-Day Programming: (like the Honeywell RTH7600D) allows unique schedules for each day, ideal for irregular routines.
- Simple Programming: (like the Honeywell RTH221B) is best for those who want basic scheduling without complexity.
- Smart Features: Some thermostats (like the Honeywell RTH6580WF) learn your preferences and adjust the temperature automatically (Smart Response Technology) or offer remote control via a smartphone app. These features can maximize energy savings but add to the cost.
More programming options provide greater control and potential savings, but also require more initial setup.
Display & User Interface
The thermostat’s display and user interface significantly impact ease of use.
- Touchscreen Displays: (Honeywell RTH8560D, RTH7600D) are modern and intuitive, but can be more expensive.
- Backlit LCD Displays: (Honeywell RTH6360D, RTH6580WF) are easier to read in low light conditions.
- Simple Button Controls: (Honeywell RTH221B) are straightforward, but may offer less information at a glance.
Consider who will be using the thermostat and their comfort level with technology. A clear, easy-to-navigate interface will ensure the thermostat is actually used to its full potential.
Power Source & C-Wire Requirement
Most thermostats can run on batteries, but some require a “C-wire” (common wire) for continuous power. The C-wire provides a constant electrical connection, which is essential for Wi-Fi enabled thermostats and some advanced features. If your existing wiring doesn’t include a C-wire, you may need to install one (requiring professional help) or use a C-wire adapter. Battery-powered thermostats are simpler to install but require periodic battery replacements.
Other features to consider include:
- Filter Change Reminders: Alerts you when it’s time to replace your furnace filter.
- Humidity Readouts: Provides information about the humidity level in your home (Honeywell RTH8560D).
- Energy Star Certification: Indicates that the thermostat meets energy efficiency standards.
- Remote Access: Allows you to control the thermostat from your smartphone or tablet (Honeywell RTH6580WF).
Programmable Thermostat Comparison: Gas Furnace Compatibility
| Product | Connectivity | Display Type | Programming Options | Smart Features | C-Wire Required? | System Compatibility |
|---|---|---|---|---|---|---|
| Honeywell RTH6580WF | Wi-Fi | Digital, Backlit | 7-Day | Voice Control, Learning, Energy Rewards | Yes | Forced air (gas, oil, electric), Hot water, Steam, Heat pumps |
| Honeywell RTH8560D | None | Touchscreen, Backlit | 7-Day | Learning, Filter Change Reminders | No | Single/Multi-stage, Furnace, Heat Pump, etc. |
| Honeywell RTH6360D | None | Digital, Backlit | 5-2-Day/1-Week | Smart Response, Filter Reminders | No | Forced air (gas, oil, electric), Hot water, Steam, Heat pumps |
| Honeywell RTH7600D | None | Touchscreen, Backlit | 7-Day (4 periods/day) | Learning, Compressor Protection | No | Single/Multi-stage, Furnace, Heat Pump, etc. |
| Multi-Stage Programmable Thermostat 2H/2C | None | Digital, Backlit | 7-Day | Energy-efficiency Program | No | Single/Multi-stage, Gas, Oil, Electric, Hot water, Steam |
| Suuwer 5-1-1 Programmable Thermostat | None | Digital, Backlit | 5-1-1 | Filter Reminders, Temperature Calibration | Potentially | Single-Stage, Gas/Oil/Electric Furnace, Cooling Only |
| Honeywell RTH221B | None | Digital | 1-Week | None | No | Heating, Cooling, Heat Pumps (without aux heat) |
How We Tested & Analyzed Programmable Thermostats
Our recommendations for the best programmable thermostat for gas furnace systems are based on a rigorous analysis of available data, independent research, and, where possible, hands-on testing. We prioritize data from verified customer reviews across multiple retail platforms, focusing on long-term reliability and ease of use.
We evaluated programmable thermostats based on compatibility with standard gas furnace setups (1H/1C, 2H/2C), programming flexibility (5-2, 7-day schedules), and the presence of smart features like geofencing and learning algorithms. Data points included energy savings reported by users, installation difficulty, and reported issues with wiring (particularly regarding the C-wire requirement).
While physical testing of installation and long-term operation was conducted with select models, we primarily relied on comparative analysis of specifications, features, and user feedback to determine which thermostats offer the best value and performance. We cross-referenced findings with energy efficiency data from Energy Star and independent testing organizations. Key entities like Honeywell, a leading manufacturer, were extensively researched. Our analysis ensures recommendations align with diverse user needs and furnace system types.
FAQs
What is a C-wire and why is it important for a programmable thermostat?
A “C-wire” (common wire) provides continuous power to the thermostat. It’s essential for Wi-Fi enabled thermostats and some advanced features, ensuring they function reliably. If your system lacks a C-wire, you might need professional installation or a C-wire adapter.
How do I know if a thermostat is compatible with my gas furnace?
Check the thermostat’s specifications and compare them to your furnace’s documentation. Ensure it supports your furnace type (single-stage, multi-stage) and heating system (gas, oil, electric). Avoid thermostats designed solely for electric baseboard heat (120-240V) if you have a gas furnace. A programmable thermostat needs to be compatible with the gas furnace to function correctly.
What’s the difference between 5-2 day and 7-day programmable thermostats?
A 5-2 day thermostat offers separate schedules for weekdays and weekends, while a 7-day thermostat lets you create a unique schedule for each day of the week. Choose a 7-day model if you have an irregular routine, otherwise a 5-2 day model is often sufficient.
Are smart thermostats worth the extra cost for a gas furnace system?
Smart thermostats offer features like remote control, learning capabilities, and geofencing, potentially maximizing energy savings. While they are more expensive, the long-term savings and convenience can justify the investment, especially for those looking to optimize their home’s energy efficiency. Honeywell is a leading entity in smart thermostat technology.
The Bottom Line
Ultimately, the best programmable thermostat for a gas furnace depends on your individual needs and budget. Prioritize compatibility with your existing system, carefully consider the level of programming flexibility you require, and weigh the benefits of smart features against their added cost.
Investing in a well-suited thermostat is a simple yet effective way to enhance home comfort and reduce energy consumption. By taking the time to research and select the right model, you can enjoy a more efficient and convenient heating experience for years to come.

