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.
Emerson ST55 Wi-Fi Smart Thermostat with Wall Plate
Product details
General specs
- Brand: Emerson
- Model: ST55
Starting from €77.18
Last price update: 10/3/26
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| Brand | Emerson | Honeywell Home | vine | Wyze | Amazon Renewed | Honeywell |
| Model | ST55 | RCHT8612WF | TJ-225B | ST76 | RTH9580WF | |
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| Price | €77.18 | €136.54 | €47.29 | €191.84 | €121.78 | €133.04 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 20, 2026 | Jun 24, 2026 | May 29, 2026 | Jun 24, 2026 | May 20, 2026 | Jun 24, 2026 |
| Compatibility | Most HVAC equipment with C-wire | Most residential heating and cooling systems | Alexa, Google Assistant | 90% home systems | Apple iOS, Android | |
| Connectivity | Wi-Fi | Wi-Fi | Wi-Fi | |||
When this device makes sense
Product confidence
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