
Honeywell Home RTH6580WF
Score: 75/100
ecobee3 Smarter
Score: 84/100Rankings

The ecobee3 Smarter thermostat provides a 3.5-inch color touchscreen and a suite of built-in sensors for precise climate control, along with broad 24 V HVAC compatibility and optional Power Extender Kit. It requires a C-wire or additional kit and uses older 2.4 GHz Wi-Fi, which may limit some setups. Best suited for users wanting multi-zone sensing and Apple ecosystem integration.

The Honeywell Home RTH6580WF is an affordable Wi-Fi thermostat that offers solid basic scheduling and broad system compatibility. Its main drawbacks are the lack of geofencing, auto-learning, and the need for a C-wire. It is best suited for budget-conscious homeowners with standard 24 V HVAC systems who want voice-assistant control.
| Attribute | ![]() | ![]() |
|---|---|---|
1 years | 3 yearsbest | |
— | 3.5 inchbest | |
| ↓ lower better | 0.544 kgbest | 0.612 kg |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
HVAC Compatibility | Gas/oil/electric heat with central AC, heat pump (with/without backup/aux heat), heat only (with/without fan), cool only, multi-stage up to 2 heat/2 c | ~95% of 24V systems (conventional 2H/2C, heat pump 4H/2C, gas/oil/electric/dual fuel, humidifier/dehumidifier/ventilator/HRV/ERV) |
Warranty (years) | 1 years | 3 years |
Connectivity(1) | ||
Smart Home Integration | Alexa, Google Assistant, Samsung SmartThings, IFTTT, Bonomi, Wink, Stringify | Apple HomeKit, Amazon Alexa, Google Assistant |
Power & Installation(1) | ||
Power Source | 24 V | 24 VAC |
Display(1) | ||
Display Type | Backlit digital | color touchscreen |
Build & Design(2) | ||
Device Weight (kg) | 0.544 kg | 0.612 kg |
Device Dimensions (H×W×D) (mm) | 147x89x38 mm | 23.6×100.3×100.3 mm mm |


Products in the top-left offer the best value (high score, low price).

Professional reviewers consider the Honeywell RTH6580WF a solid budget smart thermostat that delivers essential Wi-Fi functionality without the expense of premium models. They commend its reliable build, ENERGY STAR efficiency, and broad system compatibility, while noting the absence of geofencing, auto-learning, and the need for a C-wire as drawbacks.
Everyday users generally praise the thermostat for its easy installation, straightforward Wi-Fi setup, and noticeable energy savings. Common frustrations revolve around wiring requirements, occasional app or connectivity glitches, and the lack of automatic schedule learning.

Professional reviewers commend the Ecobee3 for its comprehensive sensor suite that enables smart recovery and precise humidity management, as well as its extensive HVAC compatibility that covers most 24V systems. They note its value for multi-zone comfort without a hub, while pointing out the need for a C-wire or Power Extender Kit and the lack of newer Wi-Fi standards compared to later models.
Everyday users praise the thermostat for its straightforward installation and reliable Wi-Fi control, especially appreciating the seamless Siri and HomeKit integration. The most common feedback revolves around occasional wiring difficulties in homes without a C-wire, but overall sentiment is highly positive.
“ease of install and Wi-Fi control”

“seamless Siri/HomeKit remote access”

