
Honeywell Home RTH6580WF
Score: 75/100
Mysa Smart Thermostat
Score: 74/100Rankings

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.

Mysa's Smart Thermostat V2 is a line-voltage Wi-Fi thermostat designed for electric baseboard and similar heaters, delivering up to 26% energy savings with precise temperature and humidity alerts. Its compatibility is limited to electric heating systems and it lacks battery backup and Bluetooth, restricting broader use cases. Perfect for homeowners upgrading electric heating with smart controls and zoning capabilities.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 0.28 °Cbest | |
1 years | 2 yearsbest | |
| ↓ lower better | 0.544 kg | 0.51 kgbest |
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 | Electric baseboard, convector, radiant ceiling, self-contained hydronic baseboard |
Warranty (years) | 1 years | 2 years |
Connectivity(1) | ||
Smart Home Integration | Alexa, Google Assistant, Samsung SmartThings, IFTTT, Bonomi, Wink, Stringify | Apple HomeKit, Amazon Alexa, Google Home |
Power & Installation(2) | ||
C‑Wire Requirement | true | false |
Power Source | 24 V | 120-240 V AC |
Display(1) | ||
Display Type | Backlit digital | LED with capacitive touch touchscreen |
Build & Design(2) | ||
Device Weight (kg) | 0.544 kg | 0.51 kg |
Device Dimensions (H×W×D) (mm) | 147x89x38 mm | 129.5×88.9×20.3 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 consistently commend the Mysa V2 for its ease of installation, substantial energy-saving claims, and extensive smart-home integration, positioning it as the top choice for electric baseboard heating upgrades. The main criticisms focus on wiring requirements and the lack of support for low-voltage heating systems.
Direct consumer reviews are not present in the sourced data, but the product’s multi‑pack offerings and emphasis on family‑friendly app access suggest a positive reception among homeowners seeking whole‑home zoning and remote control.