Looking for a heat-only programmable thermostat to optimize comfort and energy use? This guide highlights five strong options ideal for single-stage heating systems. Each pick is chosen for straightforward programming, reliable performance, and clear usability. Best for: homeowners updating an old system, renters installing a replacement, or anyone who wants simple scheduling without multi-zone complexity.
The following quick-reference table compares the five recommended models, focusing on what they’re best for and notable considerations.
| Product | Best For | Key Benefit |
|---|---|---|
| RTH20B (Honeywell Home) | 5-2 day schedules, direct replacement | Clear display, flexible reminders |
| TH1100DV1000 Pro-Digital | Very simple 2-wire heat-only systems | Backlit display, easy-to-read temperature |
| RTH7600D | 7-day programming, daily automation | Weekend and weekday schedules in one device |
| RTH22B | 2 heat/2 cool capability (conventional or heat pump) | Flexible programming for more complex homes |
| Lux Pro PSP511LC | Budget-friendly, 5-2 with backlight | Quick programming with Lux speed dial |
New! Honeywell Home Programmable Thermostat, RTH20B
The RTH20B offers 5-2 day scheduling, which is ideal for households with weekday vs weekend routines. It is a direct replacement for older Honeywell models, making upgrading straightforward for existing wiring. Best for homeowners who want reminders to change air filters and simple, readable display settings.
Best for: users who need a clear, easy-to-program interface and the flexibility to adapt display options. Limitations: might be less ideal for those who want full 7-day variations without manual switching; check compatibility with your current base before upgrading.
Honeywell TH1100DV1000 Pro-Digital 2-Wire Heat Only
This model is a simple heat-only option for 2-wire systems. It features a backlit display for easy reading and displays ambient temperature at all times, which helps confirm when the space has reached comfort levels. Best for: homes with straightforward heating needs and users who value a lit, easy-to-read interface.
Caution: not suitable for multi-stage or cooling-capable setups; ensure your wiring matches the product’s 2-wire requirement before purchase.
Honeywell Home RTH7600D 7-Day Programmable
The RTH7600D provides a full 7-day programming interface with four periods per day, allowing precise control over heating schedules. It supports home and away temperature settings to optimize energy use when you’re out. Best for: households seeking weekly automation with a relatively simple setup.
Limitation: some users may prefer non-programmable backup modes for simple overrides; verify that the 7-day programming fits your routine before installing.
New! Honeywell Home Programmable Thermostat, RTH22B
The RTH22B supports conventional or heat pump configurations with up to 2 heat/2 cool stages, offering flexibility for more complex homes. It includes a larger display and multiple programming options, including 7-day and 5-1-1/5-2 schedules. Best for: homes that may expand to heat pumps or require more nuanced control than a basic heat-only model.
Caution: this is a more capable model; ensure your system and wiring can support its extra features to avoid compatibility issues.
Lux Pro PSP511LC Programmable Thermostat
The Lux Pro PSP511LC stars a 5-2 day programming scheme with a backlit display and an exclusive speed dial for quick setup. It’s a budget-friendly option that still delivers dependable daily control for heating. Best for: budget-conscious buyers who want straightforward scheduling without extra frills.
Limitation: while affordable, it may lack some advanced customization found in higher-end models; confirm it meets your specific programming needs before choosing.
Buying Guide
What matters most when choosing a heat-only programmable thermostat?
- Compatibility: Ensure the thermostat supports a single heat/one cool or heat-only configuration matching your system. Some models support multistage or heat pumps, which may not be needed.
- Programming options: Decide if you want 5-2 day, 7-day, or 5-1-1 scheduling. More complex homes may benefit from broader scheduling formats.
- Display and usability: A large, readable display and backlighting simplify daily use. Consider whether you want a decorative matching plate or a simple unit.
- Installation: Note whether the device requires 2-wire or more, and whether replacement is a straightforward base swap or a more involved process.
- Reminders and diagnostics: Some units offer air-filter change reminders or diagnostic readouts to help maintenance and efficiency.
How to choose between basic and programmable models?
- Basic, non-programmable models are simple for override control but offer less energy saving potential.
- Programmable models can reduce energy use by automatically adjusting temperatures when you’re away or asleep.
- Consider your routine: if your schedule is predictable, 7-day programming can maximize savings; if it varies, 5-2 or 5-1-1 options provide balance.
What should you check before buying?
- Wiring compatibility: Some thermostats require specific wire counts (e.g., 2-wire). Confirm compatibility with your current furnace or HVAC controller.
- System type: Verify if your system is conventional or heat pump, particularly with models offering dual-stage programming.
- Future upgrades: If you anticipate a future upgrade (e.g., adding cooling or a smart home integration), choose a model that can accommodate that path later.
Quick tips for installation and use
- Turn off power to your HVAC system before removing the old thermostat and installing a new one.
- Mount the wall plate level and secure the base; properly connect wires to the labeled terminals.
- Program the thermostat following the user manual’s step-by-step guidance for your chosen schedule.
FAQ
- Q: Do heat-only programmable thermostats save energy? A: Yes, by automatically lowering heat when you’re away or asleep, reducing energy use without sacrificing comfort.
- Q: Can I replace an old thermostat myself? A: In many cases, yes, if you’re comfortable with basic wiring. Always turn off power and follow the installation guide.
- Q: Is a 7-day programmable model better than a 5-2 model? A: It depends on your routine; 7-day offers full weekly customization, while 5-2 is simpler for weekday/weekend patterns.
- Q: Will these work with heat pumps? A: Some models (like the RTH22B) support heat pump configurations; verify system compatibility before purchasing.
- Q: Do these thermostats require a professional installation? A: Most standard installations can be DIY, but complex HVAC setups or uncertain wiring may require a pro.