Delivers smart, intuitive control for electric floor heating systems. With app connectivity, voice assistant support, and detailed energy monitoring, it combines convenience, safety, and efficiency in a sleek touchscreen design.
Brand: OJ Electronics
Availability: Sold In Store - Ships From Store (10 available in store). (More Info)
Shipping: Free to Continental US (More Info)
The OJ Microline UWG4 Wi-Fi Floor Heating Thermostat combines advanced connectivity, sleek design, and intuitive touchscreen control for effortless comfort management. Designed for electric underfloor heating systems, this smart thermostat provides convenient remote access through the OJ Microline app, allowing users to control and monitor home heating from anywhere.
With voice control compatibility via Amazon Alexa and Google Assistant, the UWG4 offers a modern, hands-free experience. Its 3.5" full-color touchscreen, interactive setup wizard, and customizable scheduling make operation simple for both homeowners and installers. Built with safety and precision in mind, the thermostat includes a Class A GFCI, energy logging, and universal floor sensor compatibility, ensuring optimal performance for a variety of flooring materials.






















| Model | UWG4-4999 | Type | Wi-Fi Programmable Touchscreen Thermostat |
|---|---|---|---|
| Voltage Supply | 120 / 240 VAC, 50/60 Hz | Load Capacity | 15A maximum (resistive load) |
| Power Output | 1,800 W @ 120 V / 3,120 W @ 208 V / 3,600 W @ 240 V | GFCI Protection | Class A (5 mA trip level) |
| Temperature Range | +41°F to +104°F (+5°C to +40°C) | Floor Limit Range | +41°F to +104°F (+5°C to +40°C) |
| Floor Protection (Laminate/Wood) | 82°F (27.5°C) | Floor Protection (Tile) | 88°F (31°C) |
| Ambient Temp. Range | +32°F to +104°F (0°C to +40°C) | On/Off Differential | 0.7°F (0.4°C) |
| Regulation Principle | PWM / PI | Enclosure Rating | IP20 |
| Floor Sensor Type | NTC (10 KΩ) 15 ft (4.5 m) | Display | 3.5" Color Resistive Touchscreen (65k Color) |
| Dimensions (L x W x H) | 3.19" x 1.97" x 5.08" | Warranty | 3-Year Limited Warranty |
UWG4-4999 Wi-Fi Touchscreen Thermostat - Product Data Sheet
UWG4-4999 Wi-Fi Touchscreen Thermostat - User Manual
UWG4-4999 Wi-Fi Touchscreen Thermostat - Product Brochure
UWG4-4999 Wi-Fi Touchscreen Thermostat - Quick Guide
OJ Microline Electric Floor Heating Product Catalogue
When is My Thermostat Produced
Exchange of Front Plate on UWG4 and UDG4
Troubleshooting Fault Codes Guide
How to Connect to Google Assistant and Amazon Alexa
Declaration of Conformity
| SKU | MH UWG4-4999 |
|---|---|
| UPC | 799456732374 |
| Non-Returnable | No |
| Manufacturer | OJ Electronics |
| Manufacturer Part Number | UWG4-4999 |
| Voltage | 120/240 |
| Weight (lbs.) | 0.75 |
| Dimensions (L x W x H) | 3.19" x 1.97" x 5.08" |