OJ Microline UWG4-4999: WiFi Radiant Floor Heating Thermostat with GFCI

Overview

Experience intelligent control with the OJ Microline UWG4-4999, a WiFi programmable thermostat designed for electric radiant floor heating. It combines a Class A GFCI with remote connectivity and a 3.5 inch color touchscreen, delivering a streamlined look alongside dependable performance for a variety of flooring types.

What makes it stand out

• Safe, grounded operation with Class A GFCI and built‑in WiFi for remote monitoring and control.
• Dual voltage support (120V/240V) and dual sensing (air and floor) for flexible setups and accurate comfort.
• Broad compatibility with tile, marble, carpet, laminate, concrete, and wood floors, including use in damp or wet spaces.
• WiFi connectivity enables remote control, monitoring, and energy logging from mobile devices or a PC.

Smart features for everyday use

• 7‑day programmable schedule that aligns comfort with your routine, while the install wizard simplifies setup.
• Adaptive, self‑learning function adjusts runtime to maintain set temperatures and can help reduce unnecessary cycling.
• Open Window Mode, Vacation Mode, and a Child Lock provide practical options for family living and busy homes.
• Power logging delivers viewing of energy usage, putting control in your hands—without guessing.

Design, durability and convenience

The 3.5-inch responsive color touchscreen offers a modern, uncluttered look that blends with most decors. The UWG4-4999 is C‑UL/us Listed, suitable for wet room installations, and comes with a 3‑year limited factory warranty for added peace of mind.

Technical details at a glance

• Load capacity: 15 Amps at 120V (1800W) or 3600W at 240V, with the ability to control secondary relays.
• Floor limit range: +41 to +104F (+5 to +40C); ambient range: +32 to +104F (0 to +40C).
• Includes floor sensor and floor limiting features tailored for laminate and wood floors.

Designed to offer flexibility, comfort, and insight, this thermostat presents an approachable way to manage radiant heating in a variety of spaces. While results vary by installation and usage, the UWG4-4999 provides options to optimize comfort and energy awareness.