
Honeywell Home RTH9585WF1004
Score: 73/100
Mysa Smart Thermostat
Score: 74/100Rankings

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.

Honeywell Home RTH9585WF1004 offers a sleek full-color touchscreen and supports both Alexa and Google Assistant, backed by ENERGY STAR certification. It requires a C-wire and can suffer from temperature accuracy and occasional app glitches. Best suited for homeowners wanting a customizable display and multi-assistant integration at a moderate price.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 0.28 °Cbest | |
1 years | 2 yearsbest | |
| ↓ lower better | 0.204 kgbest | 0.51 kg |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
General(2) | ||
HVAC Compatibility | Forced air, hot water, steam, heat pumps | Electric baseboard, convector, radiant ceiling, self-contained hydronic baseboard |
Warranty (years) | 1 years | 2 years |
Connectivity(1) | ||
Smart Home Integration | Alexa, Google Assistant, SmartThings, IFTTT | Apple HomeKit, Amazon Alexa, Google Home |
Power & Installation(2) | ||
C‑Wire Requirement | true | false |
Power Source | 24V | 120-240 V AC |
Display(1) | ||
Display Type | Full-color touchscreen | LED with capacitive touch touchscreen |
Build & Design(2) | ||
Device Weight (kg) | 0.204 kg | 0.51 kg |
Device Dimensions (H×W×D) (mm) | 22×114×89 mm mm | 129.5×88.9×20.3 mm mm |

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

Professional reviewers commend the Honeywell RTH9585WF1004 for its stylish, full-color display, easy integration with Alexa and Google Assistant, and its Smart Response learning that simplifies scheduling. They also highlight its ENERGY STAR rating and Demand Response capability as strong points for energy-conscious buyers, while noting its reliance on a C-wire as a potential limitation.
Everyday users appreciate the intuitive touchscreen, quick setup, reliable Wi-Fi control, and attractive customizable design. Common praise centers on energy-usage reports and voice-control convenience, whereas recurring complaints involve temperature accuracy, small size, occasional touchscreen lag, app instability, and Wi-Fi connectivity issues.




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.