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.
Amazon S6ED3R Refurbished Smart Thermostat
Available offers (3)
Current
Refurbished
Retailer
€46.27
Available to order
Price history by offer
Volatility: HighFeatures
- ENERGY STAR certified
- DIY install
- Works with Alexa
- C-wire required
- Refurbished and tested
- Automatic comfort zones
- Save money with rebates
- Save energy
- On-the-go control
- Reliable Honeywell technology
- Supports temperature sensors
General specs
- Brand: Amazon
- Model: S6ED3R
- Seller: Retailer
- ID: B08KH8JR91
- C-Wire: Required
- Dimensions: 3.56, 0.84, 3.56
- Scheduling: 7-Day
- Connectivity: Wi-Fi
- Display Type: LCD
- Power Source: Hardwired
- Control Methods: App, Voice
- OS Compatibility: Android, iOS
- Compatible Systems: Air Conditioner, Gas Boiler, Electric Boiler, Electric Floor Heating, Fan Coil Unit, Hydronic Floor Heating, Water Heating
- Smart Home Compatibility: Amazon Alexa
- First listed by seller: December 9, 2025
If you are interested in more details, you can find full information on the seller's page.
Price History for seller Retailer
Shipping options
Delivery to 
United States
United States
Available
For the homeowner tired of manual adjustments and high energy bills, this smart thermostat offers a simple upgrade. It's perfect for managing comfort while you're at work or ensuring the house is warm before you return from a weekend trip.
Beyond basic home security, this device provides financial peace of mind. The Alexa app guides you through DIY installation, and it works with Alexa for hands-free control. You receive an email with local rebate details after purchase, potentially saving you money upfront. According to EPA estimates, ENERGY STAR certification can cut your yearly energy costs by an average of $50.
Create comfort zones using compatible Echo devices to address hot or cold spots automatically. The thermostat adjusts based on presence detection, so you come home to the perfect temperature without lifting a finger. Made with Honeywell Home Thermostat Technology, it offers reliable performance backed by decades of experience.
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| Brand | Amazon | Emerson | Honeywell | Honeywell Home | vine | LEVOIT |
| Model | S6ED3R | ST75W | RENEWRTH9585WF/U | RTH2SMC/N | B0FFBC4MV4 | Aura 400S |
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| Price | €46.27 | €222.47 | €70.28 | €58.87 | €71.18 | €71.64 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Jun 24, 2026 | May 19, 2026 | May 29, 2026 | Jun 24, 2026 | Jun 24, 2026 | Jun 24, 2026 |
| C-Wire | Required | Required | Required | Required | ||
| Dimensions | 3.56, 0.84, 3.56 | 4.5, 3.5, 0.88 | 3.43, 1.17, 5.13 | 4, 4, 1 | ||
| Scheduling | 7-Day | Flexible programming | 7-Day | 24/7 | ||
| Connectivity | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi |
| Display Type | LCD | Color LCD | Touchscreen | LCD | LCD | LCD |
| Power Source | Hardwired | Hardwired | Hardwired | Wired | Hardwired | |
| Control Methods | App, Voice | Touchscreen, App | Touchscreen | App, Buttons | App, Voice | App, Touchscreen, Voice |
| OS Compatibility | Android, iOS | Android, iOS | Android, iOS | |||
| Compatible Systems | Air Conditioner, Gas Boiler, Electric Boiler, Electric Floor Heating, Fan Coil Unit, Hydronic Floor Heating, Water Heating | Forced air (gas, oil or electric), Hot water and steam, Heat pumps with electric backup | Air Conditioner, Gas Boiler, Electric Boiler, Water Heating | Air Conditioner, Heat Pump Systems | ||
| Smart Home Compatibility | Amazon Alexa | Amazon Alexa, Google Assistant, Apple HomeKit | Amazon Alexa, Google Assistant | |||
| Mounting Type | Wall Mount | Wall Mount | Wall Mount | |||
Amazon S6ED3R White ENERGY STAR certified
€46.27
When this device makes sense
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