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“Smart-thermostat coverage frames OJ Electronics as the OEM behind much of the floor-heating category, crediting the UWG4 line's dual sensing and adaptive pre-heat as the benchmark feature set rivals license.”
Is the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat worth it?
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat ($156.00) is a top pick with a 9/10 consensus score across 3 expert reviews. Experts highlight true dual sensing (air plus floor) with an adaptive learning function that pre-heats the slab so the floor is warm at the scheduled time, not an hour later. and built-in class a gfci and dual-voltage 120v-240v support handle a 15a zone, roughly 150 sq ft at 120v or 300 sq ft at 240v.. techhive says: "Smart-thermostat coverage frames OJ Electronics as the OEM behind much of the fl..." Best for: Buyers who want OEM-reference floor-sensor accuracy, Single-zone tile floors on Alexa or Google.
Must Buy3 Expert Reviews
Price Range
Check Price on Amazon →$156.00
Verified 40d ago
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OJ Microline UWG4-4999 WiFi Floor Heating Thermostat
NM
Nicholas Miles · Editor-in-Chief & Methodology Owner
Climate Control
SHE ScoreAbove Average
SmartHomeExplorer proprietary rating
6.6/10
3 expert sources
Compatibility Breadth5/10
Setup Ease6/10
Reliability7.8/10
Value Rating9/10
Future-Proofing5/10
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat earns a SHE Score of 6.6/10, driven by strong value (9/10) with room to improve in future-proofing (5/10). Based on 3 expert sources and SmartHomeExplorer compatibility analysis.
How we calculate the SHE Score →Expert Consensus: 9/10 across 3 sources
Updated this week“Smart-thermostat coverage frames OJ Electronics as the OEM behind much of the floor-heating category, crediting the UWG4 line's dual sensing and adaptive pre-heat as the benchmark feature set rivals license.”
Key Features
- ✓ Dual air-and-floor sensing with adaptive pre-heat learning
- ✓ Built-in Class A GFCI for ground-fault protection
- ✓ 15A load capacity, dual-voltage 120V-240V
- ✓ 3.5-inch full-color touchscreen with interactive setup wizard
- ✓ Alexa and Google Assistant voice control
- ✓ Child lock, vacation mode, and open-window detection
Best For
Buyers who want OEM-reference floor-sensor accuracySingle-zone tile floors on Alexa or Google
What Experts Agree On
What Experts Love
- ✓ True dual sensing (air plus floor) with an adaptive learning function that pre-heats the slab so the floor is warm at the scheduled time, not an hour later.
- ✓ Built-in Class A GFCI and dual-voltage 120V-240V support handle a 15A zone, roughly 150 sq ft at 120V or 300 sq ft at 240V.
- ✓ OEM-grade hardware: OJ Electronics makes the controllers rebadged by Schluter, Nuheat, and others, so the floor-sensor accuracy is the reference the category copies.
- ✓ A 3.5-inch full-color touchscreen with child lock, vacation mode, and open-window detection keeps day-to-day control on the wall, not buried in an app.
Common Criticisms
- ✗ No Apple HomeKit; voice control is limited to Alexa and Google Assistant, a real gap for Apple-first homes.
- ✗ The 5mA GFCI is sensitive to long mat runs, and owners report nuisance trips when total cable length pushes leakage past the threshold.
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What The Experts Say
Ready to buy the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat?
Check Price on Amazon$156.00 · 3 expert sources · 9/10 consensus
Frequently Asked Questions
Is the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat worth it?
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat earns a 9/10 consensus score across 3 expert sources and is rated "Must Buy". At $156.00, it is best for Buyers who want OEM-reference floor-sensor accuracy. techhive notes: "Smart-thermostat coverage frames OJ Electronics as the OEM behind much of the floor-heating category, crediting the UWG4 line's du..."
How much does the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat cost?
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat is priced at $156.00. With a 9/10 score from 3 expert reviews and a "Must Buy" rating, that price represents strong value relative to the ~7.5/10 average for Climate products. Prices shift often, so check the live figure before buying.
Who is the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat best for?
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat is best for Buyers who want OEM-reference floor-sensor accuracy, Single-zone tile floors on Alexa or Google. Experts rate it "Must Buy" with a 9/10 consensus across 3 sources.
How does the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat compare to other Climate options?
Among the Climate products we have aggregated, the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat ranks above average with a 9/10 score. See our full category comparison for head-to-head details.
What smart home systems does the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat work with?
The OJ Microline UWG4-4999 WiFi Floor Heating Thermostat works with Amazon Alexa. Check the compatibility notes above for any hub dependencies or setup requirements before you buy.
What are the best alternatives to the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat?
If the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat ($156.00, 9/10) is not the right fit, the closest alternatives in Climate are Schluter DITRA-HEAT-E-WiFi Thermostat (DHERT104), nVent Nuheat Signature WiFi Thermostat (AC0055). Compare them on price, ecosystem support, and expert consensus to find your match.
What are the pros and cons of the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat?
The main strengths of the OJ Microline UWG4-4999 WiFi Floor Heating Thermostat are true dual sensing (air plus floor) with an adaptive learning function that pre-heats the slab so the floor is warm at the scheduled time, not an hour later. and built-in class a gfci and dual-voltage 120v-240v support handle a 15a zone, roughly 150 sq ft at 120v or 300 sq ft at 240v.. The most-cited downside is no apple homekit; voice control is limited to alexa and google assistant, a real gap for apple-first homes.. Overall, 3 expert sources rate it "Must Buy" with a 9/10 consensus score.
Sources & Methodology
This review aggregates 1 independent expert review into a single consensus score. See how we build consensus scores and the SHE Score methodology.
Expert review sources cited on this page:
- techhive
Affiliate disclosure: SmartHomeExplorer.com participates in the Amazon Associates program. We earn a commission from qualifying purchases at no extra cost to you. This consensus review is based on 3 independent expert reviews — we did not test this product ourselves. Always verify current prices and availability before purchasing.
Independence notice: Smart Home Explorer is an independent publication. OJ and other product names, logos, and brands referenced on this page are the property of their respective owners and are used for identification purposes only. This review is not sponsored by, affiliated with, or endorsed by OJ or any other manufacturer named in this article.