nHance Programmable Thermostat
- Program up to 4 setting changes for each day of the week
- Pre-programmed settings for ultra-fast installs
- With an included floor sensor, your system can cycle on and off and continuously adjust to save energy
- Large, backlit display for easy reading in low light areas
- Easily track your energy usage
Notices
Quebec Repairability Notice
Avis important pour les consommateurs du Québec:
WarmlyYours ne fournit ni services de réparation ni pièces de rechange pour ce produit. Si votre thermostat de chauffage de sol intérieur tombe en panne pendant la période de garantie, nous remplacerons l'unité complète conformément à notre politique de garantie. Notre équipe de soutien technique est disponible par téléphone 24h/24 et 7j/7 pour l'assistance à l'installation et au dépannage. Pour tous les détails, veuillez consulter notre Politique de Retour. Cet avis est fourni conformément à l'article 39 de la Loi sur la protection du consommateur du Québec (telle que modifiée en 2025).
Important Notice for Québec Consumers:
WarmlyYours does not provide repair services or replacement parts for this product. If your indoor floor heating thermostat fails within the warranty period, we will replace the entire unit according to our warranty policy. Our technical support team is available 24/7 by phone for installation and troubleshooting assistance. For full details, see our Return Policy. This notice is provided in accordance with Québec’s Consumer Protection Act, section 39 (as amended in 2025).
nHance Programmable Thermostat Description
Like floor heating itself, the programmable nHance thermostat represents a harmonious blend of style and usability. Its modern design incorporates a large, backlit display that makes it easy to read in low light areas. This dual voltage (120V/240V) control, with built-in self-testing GFCI, comes with pre-programmed settings for ultra-fast installs.
With its intuitive user-interface, you can easily set the nHance up for your exact needs and specifications. If you have a consistent schedule, this programmable thermostat will deliver a maximum level of comfort when you need it most, like during your morning routine, while still keeping your overall energy use to a minimum. Includes floor sensor.
- Pre-programmed for quick set up
- 7-day programmable
- Features “child-lock” function
- Energy Log for tracking use
- Works with hardwired WarmlyYours infrared heating panels
- 3-year warranty
Specifications
Warranty / Certifications
| Approvals | cULus listed |
| Ingress Protection (IPxx) Rating | IP21 |
| Warranty | Limited 3-year warranty and lifetime technical support |
Electrical
| Connection | 4 wires, double pole |
| Connection Method | Hardwired |
| Ground Fault Protection | GFCI, Class A, 5 mA |
| Maximum Current | 15 A |
| Maximum Power | 1800 W @ 120 V, 3120 W @ 208 V, 3600 W @ 240 V |
| Supply | 120 VAC, 208 VAC, 240 VAC (50/60Hz) |
Product Dimensions
| Depth | 2″ |
| Installed Depth | 0.75″ |
| Length | 4 11/16″ |
| Weight | 0.6 lbs |
| Width | 2⅞″ |
Controls
| Display | Backlit Display |
| Display Size | 3.5″ |
Thermostat
| Floor Sensor Compatibility | 10k ohms |
| Includes Floor Sensor | Yes (1) |
| Maximum Ambient Temperature Setting | 77 °F |
| Maximum Floor Temperature Setting | 104 °F |
| Minimum Ambient Temperature Setting | 32 °F |
| Minimum Floor Temperature Setting | 41 °F |
| Programmable | Yes, 7-day |
Identifiers
| SKU | UDG-4999 |
| UPC (GTIN-12) | 881308051211 |
Documents
Installation
- nHance (UDG-4999) Installation Instructions (English, French, Spanish)
- nSpiration Electrical Rough-in Kit Installation (Single Gang Box with 2 Conduits) (English)
- nSpiration Electrical Rough-in Kit Installation (Single Gang Box with Single Conduit) (English)
- nSpiration Electrical Rough-in Kit Installation (Single Gang Box without Conduit) (English)
Operation Manuals
- nHance (UDG-4999) Quick Programming Guide (English, French, Spanish)
- nHance (UDG-4999) Quick Start Guide and Specifications (English, French, Spanish)
- nHance (UDG-4999) User Manual (English, French, Spanish)
Technical Information
Wiring Diagrams
Frequently Asked Questions
Showing all 5 questions
WarmlyYours's floor heating thermostats are typically universal and can be used with the majority of electric floor heating systems as a new or replacement controller. Please review the electrical specs of both the thermostat and the heating system to ensure a proper match for the heating system, sensor, etc. You can also give us a call at (1-800-875-5285) and we can help answer any remaining questions.
Yes — the nJoy WiFi (UWG5-4999) thermostat supports all three major smart home platforms:
- Amazon Alexa — use voice commands to set temperature or turn the system on and off.
- Google Home / Google Assistant — integrates with Google Home routines and Nest displays.
- Apple HomeKit — manage your floor heating from the Apple Home app and Siri.
The nJoy also works with the dedicated nJoy app (iOS and Android), which gives you full remote control including scheduling, temperature adjustments, and energy usage history from anywhere.
The nHance (UDG4-4999) and nTrust (UTN5-4999) thermostats are not WiFi-enabled and do not integrate with smart home platforms. They must be controlled locally at the wall unit.
WarmlyYours offers three current thermostat lines for electric floor heating, each suited to different budgets and feature needs:
- nJoy WiFi (UWG5-4999) — The flagship smart thermostat. Connects to your home WiFi and is controlled via the nJoy app (iOS / Android), Amazon Alexa, Google Home, and Apple HomeKit. Features a full-colour touchscreen, 7-day programmable schedule, floor and air sensor support, and built-in GFCI protection. Best for homeowners who want remote access and smart home integration.
- nHance (UDG4-4999) — A premium non-WiFi programmable thermostat with a large colour touchscreen. Supports a 7-day schedule, floor and air sensor, and GFCI protection. Best for those who want a high-quality display and programmable scheduling without a WiFi requirement.
- nTrust (UTN5-4999) — A straightforward non-programmable thermostat for simple manual control. Compact form factor, supports a floor sensor, and includes GFCI protection. Best for secondary rooms, rental units, or anyone who prefers simple set-and-forget control.
All three thermostats are compatible with every WarmlyYours electric floor heating system (TempZone, Environ, and Slab Heat products). If you need help choosing, our radiant experts can recommend the right model for your project at no charge.
The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.
