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.
ecobee Smart Si Smart Si Smart Thermostat 2 Heat-2 Cool with Full Color Non-Touch Screen
Features
- Wi-Fi enabled
- Full color display
- Push button control
- Remote management
- Contractor branded alerts
- Intuitive user interface
- Live weather functions
- Works with heat/cool and heat pump systems
- Broadband Internet required
General specs
- Brand: ecobee
- Model: Smart Si
- Seller: Retailer
- ID: B008F40R4C
- Alerts: Contractor Branded Alerts
- Stage Type: 2 Heat - 2 Cool
- Requirement: Broadband Internet access for Wi-Fi, Weather, and Mobile features
- Connectivity: Wi-Fi Enabled
- Control Type: Push Button
- Display Type: Full Color NON-Touch Screen
- User Interface: Vivid color screen with easy-to-use interface
- Mobile Features: Adjust settings via Computer, Smartphone, or Tablet
- Thermostat Type: Smart Thermostat
- Remote Management: Yes
- Compatible Systems: Heat/Cool, Heat Pump
- Live Weather Functions: Yes
- First listed by seller: May 20, 2026
If you are interested in more details, you can find full information on the seller's page.
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Shipping options
Delivery to 
United States
United States
Available
Set your home temperature from anywhere with the ecobee Smart Si Thermostat. Its full color non-touch screen and push button controls make adjusting the temperature simple. Connect via Wi-Fi to fine-tune your heating and cooling schedule using your smartphone or computer. The built-in live weather feed helps you plan your energy use without checking another app.
This thermostat works with most heat/cool and heat pump systems. The intuitive interface cuts through setup confusion, letting you create a personalized program in minutes. You'll also get contractor branded alerts to keep you informed about system performance or needed maintenance. Broadband internet access is required to use the Wi-Fi, weather, and mobile features.
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| Brand | ecobee | Honeywell | Braeburn | Honeywell | PRO1 IAQ | Honeywell |
| Model | Smart Si | TH8321WF1001 | 7205 | RTH9585WF | T701i | TH6320WF2003/U |
| Rating |
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| Price | €53.54 | €157.97 | €59.79 | €175.64 | €96.34 | €116.03 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Jun 24, 2026 | Jun 24, 2026 | Jun 24, 2026 | Jun 24, 2026 | Jun 19, 2026 | Jun 24, 2026 |
| Connectivity | Wi-Fi Enabled | WiFi | Wi-Fi | |||
When this device makes sense
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