$109 – $149
HomeKit-native thermostat for high-voltage baseboard and in-floor heating
Want zone control for electric heat
Multi-zone management through Mysa app
Have in-floor electric heating
Compatible with 120V-240V in-floor systems
Use Apple HomeKit
Native HomeKit support, works with Siri
Have baseboard electric heaters
Designed specifically for high-voltage baseboard systems
Have low-voltage HVAC system
Mysa is for high-voltage only (120V-240V)
Need Matter support now
Matter planned for early 2026, not available yet
Want fully local Home Assistant
HA via HomeKit has reported disconnection issues
No neutral wire available
Neutral wire required for installation
HomeKit Controller integration has frequent disconnection issues requiring restart
HA CommunityOccasional unresponsive states requiring power cycle
Reddit r/HomeKitWiFi connection drops reported with mesh networks
Amazon reviewsTemperature reading can be affected by wall placement
User reviewsHA disconnections
commonCause: HomeKit Controller bridge limitations
WiFi connectivity
occasionalCause: 2.4GHz only, mesh network issues
No Matter support
occasionalCause: Planned for 2026
Cloud dependency
occasionalCause: Remote features require internet
Installing on low-voltage HVAC
Wont work - Mysa is high-voltage only
Tip: Verify you have 120V-240V electric heat
No neutral wire in junction box
Cannot complete installation
Tip: Check wiring before purchase
Expecting stable HA integration
Frequent disconnections via HomeKit Controller
Tip: Use native HomeKit or consider alternatives
Remote access, geofencing, scheduling sync, energy reports
Basic temperature control via physical thermostat
Temperature data, usage patterns, scheduling
Cloud-dependent for smart features. HomeKit provides some local control. No fully local API available.
120V-240V high-voltage. 16A/3800W max. Baseboard, in-floor, fan-forced. HomeKit native. Geofencing. Humidity sensor. 7-day scheduling. Zone control.
No Matter yet (2026). HA disconnections. Cloud-dependent. 2.4GHz WiFi only. No learning. Neutral required. High-voltage only.
Sinope TH1123ZB
If: Want Zigbee for local Home Assistant
Stelpro Maestro
If: Need Z-Wave integration
Honeywell T6 Pro Z-Wave
If: Have low-voltage HVAC
Have baseboard heaters + use HomeKit
Best HomeKit option for baseboard heat
Want affordable baseboard thermostat
$70-120 less than competitors
Need reliable Home Assistant local control
HA integration unstable - get Zigbee/Z-Wave
Have standard low-voltage HVAC
Mysa is high-voltage only
Mysa has HomeKit native and modern app. Sinope has Zigbee for local Home Assistant control. Choose Mysa for HomeKit, Sinope for local HA automation.
Source: Comparison reviewsNot yet. Mysa has announced Matter support is planned for early 2026. Currently works via WiFi with native app, HomeKit, and other integrations.
Source: Mysa announcementsMysa works with 120V and 240V high-voltage systems including baseboard heaters, in-floor heating, and fan-forced heaters. Maximum 16A/3800W. NOT for low-voltage HVAC.
Source: Mysa specsYes, but via the HomeKit Controller integration which has reported disconnection issues. For reliable local HA, consider Zigbee alternatives like Sinope.
Source: Home AssistantYes, Mysa has native Apple HomeKit support. You can control it via Siri and add to HomeKit automations without additional bridges.
Source: Mysa website