Brand: MasterHeat
Availability: On order. This item will ship when back in stock (More Info)
Shipping: Free to Continental US (More Info)
MasterHeat ConnectPlus Programmable WiFi Radiant Floor Heating Thermostat is a modern, smart thermostat designed to deliver maximum comfort and full control of your floor heating system — anytime, anywhere. With built-in Wi-Fi and compatibility with the Watts Home App, you can easily adjust settings, create flexible schedules, and monitor energy usage directly from your smartphone.
The thermostat supports voice control via Alexa and Google Assistant, automatically sets the clock, displays real-time outdoor temperature, and can shut down the system during warm weather conditions.
MasterHeat ConnectPlus — the smart, efficient, and stylish way to control your radiant floor heating system.


| Operation Voltage | 120/240 VAC, 60 Hz, 3 watts | Maximum Load | 15 Amps resistive |
|---|---|---|---|
| Maximum Power | 1800 watts at 120 VAC 3600 watts at 240 VAC |
GFCI | Class A (5 mA trip) |
| Ambient conditions | 32 to 86°F (0 to 30°C), <90% RH non-condensing | Floor Sensor | Thermistor, 10k NTC type, 300 V jacketed cable, 15' long |
MasterHeat Programmable Thermostat - ConnectPlus Installation Instructions
MasterHeat Programmable Thermostat - ConnectPlus Voice Controls
MasterHeat Programmable Thermostat - ConnectPlus Specification Sheet
| SKU | MH 500900-BB |
|---|---|
| UPC | 731007734949 |
| Non-Returnable | No |
| Manufacturer | MasterHeat |
| Manufacturer Part Number | 81020607 |
| Voltage | 120/240 |
| Dimensions (L x W x H) | 4.73" x 3.11" x 1.9" |