Honeywell RTH9580WF
Score: 75/100
Mysa Smart Thermostat
Score: 74/100Rankings
The Honeywell RTH9580WF delivers a sleek low-profile design, vibrant color touchscreen and Smart Response learning for precise temperature control. Its drawbacks include discontinuation, reliance on a C-wire and occasional Wi-Fi reliability issues. It suits tech-savvy homeowners who value aesthetics and learning algorithms but can manage potential support limitations.
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 | Compatible with 24 V HVAC (forced air, hydronic, heat pump, oil, gas, electric); not compatible with millivolt or 120/240 V baseboard electric heat | Electric baseboard, convector, radiant ceiling, self-contained hydronic baseboard |
Warranty (years) | 1 years | 2 years |
Sensors(1) | ||
Temperature Sensor Accuracy (°C) | ±1°F °C | ±0.28°C °C |
Connectivity(2) | ||
Wi‑Fi Standard | 802.11b/g/n | 2.4 GHz |
Smart Home Integration | Alexa | 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 | Capacitive touchscreen | LED with capacitive touch touchscreen |
Build & Design(2) | ||
Device Weight (kg) | 0.5443 kg | 0.51 kg |
Device Dimensions (H×W×D) (mm) | 0.88x3.5x4.5 in 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 RTH9580WF for its ultra-slim profile, vibrant customizable touchscreen, and Smart Response learning that balances comfort with energy efficiency. Editors also note the ease of programming, integrated weather data, and ENERGY STAR rating as strong points, while flagging the product's discontinuation and limited sensor array as drawbacks.
Everyday users appreciate the intuitive touch interface, precise temperature control, and the convenience of remote app management, often citing the customizable display as a fun feature. Recurring complaints focus on Wi-Fi connectivity challenges, occasional app glitches, and the lack of automatic geofencing, with some expressing concern over the thermostat being discontinued.
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.
“Intuitive touch interface”
“Wi-Fi setup issues”
