OJ Microline UDG-4999 programmable thermostat ā multi-voltage (120Vā240V) underfloor heating control with Class A GFCI protection, energy monitoring, and a large backlit display for easy, safe operation.
Brand: OJ Electronics
Availability: Sold in Store - Ships from Store or Factory (29 available in store). (More Info)
Shipping: Free to Continental US (More Info)
The OJ Microline UDG-4999 Programmable Thermostat is a premium all-in-one solution for electric underfloor heating systems, providing optimal comfort, precise temperature control, and improved energy efficiency. Designed for both residential and commercial applications, this thermostat features multi-voltage compatibility (120V / 208V / 240V) and a built-in Class A GFCI for safe installation in wet areas.
With its large backlit display, intuitive interface, and pre-programmed setup, the UDG-4999 makes controlling your floor heating system simple and efficient. Itās engineered for flexibility, offering control of floor, room, or combined temperature modes and is compatible with USG power modules for extended heating loads.






















| Model | UDG-4999 | Voltage Supply | 120ā240 VAC, 50/60 Hz |
|---|---|---|---|
| Load Capacity | 15A maximum (resistive load) | Power Output | 1,800 W @ 120 VAC / 3,120 W @ 208 VAC / 3,600 W @ 240 VAC |
| 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) | Ambient Temperature Range | +32°F to +104°F (0°C to +40°C) |
| Clock Function | 4-event programmable schedule | Control Accuracy (Differential) | ±0.7°F (±0.4°C) |
| Regulation Principle | PWM / PI control | Sensor Type | NTC (10 KĪ©) floor sensor, 15 ft (4.5 m) |
| Display | Backlit LCD | Dimensions (L x W x H) | 2.95" x 0.8" x 4.72" |
UDG-4999 Programmable Thermostat - Product Data Sheet
UDG-4999 Programmable Thermostat - User Manual
UDG-4999 Programmable Thermostat - Quick Guide
UDG-4999 Programmable Thermostat - Instructions UDG / UCG / UTN / USG
OJ Microline Electric Floor Heating Product Catalogue
| SKU | MH UDG-4999 |
|---|---|
| UPC | 881308051211 |
| Non-Returnable | No |
| Manufacturer | OJ Electronics |
| Manufacturer Part Number | UDG-4999 |
| Voltage | 120/240 |
| Weight (lbs.) | 0.75 |
| Dimensions (L x W x H) | 2.95" x 0.8" x 4.72" |