Honeywell Home RTH20B Programmable Thermostat: 5-2 day scheduling
This Honeywell Home thermostat is for the homeowner who wants simple, reliable climate control without a monthly subscription. While many focus on smart features, this model excels at providing consistent comfort through a predictable schedule, perfect for managing your family's weekday routine and weekend relaxation.
You can program separate settings for weekdays and weekends. The large backlit screen is easy to read from across the room, even in low light. It replaces older models like the RTH2300 directly, and the included wall plate makes installation straightforward. Use it with forced air systems, but note it is not compatible with electric baseboard heat. Features like a filter reminder help maintain your HVAC system efficiently. It runs on 2 AA batteries, ensuring operation during power outages.
Features
- 1 Heat/1 Cool compatibility
- backlit display
- change filter reminder
- extended 32°F low-heat setpoint
- easy installation with wall plate
- 5-2 day scheduling
General specs
- Brand: Honeywell Home
- Model: RTH20B
- Seller: Amazon
- ID: B0DSGGDCR8
- Dimensions: 8, 6, 0.84
- Scheduling: 5-2 Day
- Display Type: LCD
- Power Source: Battery
- Mounting Type: Wall Mount
- Control Methods: Buttons
- Compatible Systems: Air Conditioner, Electric Boiler, Gas Boiler, Water Heating
- First listed by seller: 2/2/26
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
| Date | Price |
|---|---|
| 2/7/26 | $34.00 |
| 2/2/26 | $34.90 |
Shipping options
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| Brand | Honeywell Home | Honeywell Home | Riseem | Heagstat | meross | Honeywell |
| Model | RTH20B | RTH21B | STN701W-Blue | STN701W | MTS200 | RENEWRTH9585WF/U |
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| Price | $34.00 | $44.40 | $54.99 | $52.99 | $79.99 | $89.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | Feb 7, 2026 | Jan 14, 2026 | Feb 7, 2026 | Feb 7, 2026 | Jan 21, 2026 | Jan 16, 2026 |
| Required | Required | Required | ||||
| Dimensions | 8, 6, 0.84 | 6.5, 1.6, 8.55 | 0.98, 3.86, 4.72 | 2.95, 1.69, 4.64 | 4.5, 3.5, 0.88 | |
| Scheduling | 5-2 Day | 7-Day, Weekly | 7-Day | Weekly | Flexible programming | |
| Connectivity | Wired | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi | |
| Display Type | LCD | LCD | LCD | Touchscreen | ||
| Power Source | Battery | Battery | Hardwired | Hardwired | Hardwired | |
| Mounting Type | Wall Mount | Wall Mount | Wall Mount | Wall Mount | Wall Mount | |
| Control Methods | Buttons | Buttons | App, Buttons | App | App, Voice | Touchscreen |
| Compatible Systems | Air Conditioner, Electric Boiler, Gas Boiler, Water Heating | Air Conditioner, Gas Boiler, Water Heating | Air Conditioner, Gas Boiler | Electric Baseboard, Convector, Fan-Forced Heater, In-Ceiling Radiant | Forced air (gas, oil or electric), Hot water and steam, Heat pumps with electric backup | |