No C Wire Options
Compare no-C-wire smart thermostats by power method: included adapters and extenders, battery power, and the line-voltage systems to rule out.
Honeywell Home RTH20B Programmable Thermostat
Product details
General specs
- Brand: Honeywell Home
- Model: RTH20B
Starting from €39.19
Last price update: 9/28/26
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| Brand | Honeywell Home | Honeywell Home | Riseem | Coiiwsei | Coiiwsei | Riseem |
| Model | RTH20B | RTH21B | STN701W-Blue | |||
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| Price | €39.19 | €44.57 | €33.45 | €29.42 | €41.91 | €20.50 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Jun 24, 2026 | May 11, 2026 | Jun 24, 2026 | May 29, 2026 | May 29, 2026 | May 20, 2026 |
| Dimensions | 8, 6, 0.84 | 6.5, 1.6, 8.55 | 0.98, 3.86, 4.72 | |||
| Scheduling | 5-2 Day | 7-Day, Weekly | 7-Day | |||
| Display Type | LCD | LCD | Extra large backlight LCD | |||
| Power Source | Battery | Battery | Hardwired | |||
| Mounting Type | Wall Mount | Wall Mount | Wall Mount | |||
| Control Methods | Buttons | Buttons | App, Buttons | |||
| Compatible Systems | Air Conditioner, Electric Boiler, Gas Boiler, Water Heating | Air Conditioner, Gas Boiler, Water Heating | Air Conditioner, Gas Boiler | Forced air (gas, oil or electric), Electric furnace, Hot water steam or gravity radiant heat, Heat only systems, Heat pump w/o auxiliary or emergency heat, Millivolt, Gas fireplaces (24V), Floor or wall furnaces, Cool only systems | Heat pump multi-stage systems, Conventional single-stage systems, Forced air (gas, oil or electric), Electric furnace, Hot water steam or gravity radiant heat, Heat only systems, Heat pump w/o or with auxiliary or emergency heat, Millivolt conventional systems, Gas fireplaces (24V), Floor or wall furnaces, Cool only systems | |
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