Knob WiFi Smart Thermostat

Overview

The SunAura WiFi Smart Knob Thermostat is a wall-mounted, flush-installed room controller that pairs the familiar, precise feel of a rotary knob with full WiFi smartphone scheduling. Turn the knob to raise or lower the set temperature, press it to switch the heating on or off, and everything else — MODE selection and CLOCK setting — is handled by two touch-sensitive keys on the panel. Behind the knob sits a bright LED screen showing room temperature, set temperature, clock, day of week, WiFi status, weather and humidity, and the heating flame indicator, so the whole state of the heating system is readable from across the room.

Where this thermostat earns its place is flexibility. It connects to your home WiFi network and the companion smart-phone app (iOS and Android), letting you programme a full weekly heating schedule, pre-heat the house before you arrive home, switch between manual, automatic and economy setback modes, and lock the settings against children — remotely, from anywhere. It is equally at home on water underfloor heating, electric underfloor heating (heating film, heating cable, heating mat, heating tile and infrared wall panels), gas and wall-hung boilers, and radiator systems: the 16 A resistive output switches electric heating directly, while the 3 A NO/NC dry contact calls for heat from a boiler or switches thermal actuators.

Every unit is built by SunAura Thermal at our Qingdao factory, with in-line quality control on every batch, CE compliance, IP20 protection and QC PASS testing before shipment, and a two-year warranty backed by direct after-sales support. For homeowners, installers and heating-system distributors, the knob thermostat combines the reliability of a purpose-built heating controller with the convenience of a modern smart-home device.

Key Features

• Precision rotary knob control — turn to adjust the set temperature in fine steps, press to switch power on and off; tactile feedback makes blind, one-hand adjustment easy.
• LED screen with touch keys — MODE and CLOCK touch buttons, plus room temperature, set temperature, clock, weekday, weather/humidity and heating flame icons, all on one clear display.
• WiFi smartphone control — remote temperature, mode and schedule changes from anywhere; the app displays valve state (Open), current room temperature and the target set temperature.
• Weekly app programming — 5+2, 6+1 or full 7-day schedules, up to six time periods per day, each with its own target temperature, so heating follows your routine instead of running all day.
• Child lock — a lock icon on the screen and an app-side switch prevent children or guests from accidentally changing settings.
• Weather and humidity display — an on-screen weather/humidity icon gives a quick read of room comfort at a glance.
• Manual / automatic / eco modes — hold a fixed comfortable temperature, follow the weekly programme automatically, or run the constant-temperature economy setback.
• Timer switch and dimmable screen — timed on/off switching and adjustable screen brightness for quiet bedrooms and living rooms.
• High-temperature protection — over-temperature cut-out safeguards the heating circuit and the connected floor build-up.
• Black and white finishes — a slim, flame-retardant PC+ABS flush-mount panel in two colours to match any room’s switch-plate aesthetic.

Display & Icon Guide

The LED screen communicates the full heating state at a glance. The ROOM reading shows the measured room temperature in large digits; the set temperature is marked separately so it is never confused with the measured value. The clock runs in 24-hour format and the weekday icons (SUN, MON … WED …) show the current day. Status icons around the display confirm the WiFi connection, the child lock, the weather/humidity reading, the active time period of the weekly programme, and the heating flame, which lights whenever the output is energised. A power switch icon and mode indicator round out the display.

Programming is done in the app. The weekly schedule separates weekdays (Monday to Friday) from the weekend (Saturday and Sunday), and the thermostat supports three planning modes: 5+2 (weekday and weekend), 6+1 and full 7-day. Each day holds up to six time periods, each with its own target temperature. As an example, a household programme might run 06:35 at 18 °C, 07:58 at 20 °C, 11:05 at 12 °C, 12:35 at 15 °C, 17:00 at 22 °C and 22:50 at 15 °C — times and temperatures are fully illustrative and adjustable to your own routine.

Control accuracy is specified for real installation conditions. Measurement error is held to ±1 °C, the switch-on differential (the temperature band before the output restarts) is adjustable from 0.5 to 5 °C to prevent short cycling, and the displayed reading can be calibrated by an offset of −9 to +9 °C against a reference thermometer. The adjustable upper and lower temperature limits span 5–90 °C, while the normal room control range runs 5–45 °C.

Technical Specifications

Applications

The knob thermostat is a universal controller for hydronic and electric heating in homes and light commercial spaces:

• Water underfloor heating — hydronic underfloor loops controlled through thermal actuators (NO or NC) on the manifold.
• Electric underfloor heating — heating film, heating cable, heating mat, heating tile, electric wall panels and electric radiators, switched directly by the 16 A output.
• Gas / wall-hung boilers and radiators — the 3 A NO/NC dry contact acts as a standard room thermostat, calling for heat from the boiler or switching radiator zone actuators.

Because the dry contact is offered in both normally open and normally closed versions, the same thermostat body adapts to almost any boiler or actuator on the market.

Installation

The thermostat is flush-mounted into a standard wall box. Wiring follows one of two schemes, depending on the heating system:

• 16 A electric heating version — connect mains live and neutral to terminals L / N and the heating load to N1 / L1; if a floor sensor is required, connect the external NTC floor sensor to terminals 5–6 and select it in the settings.
• 3 A dry-contact version — connect mains to L / N and wire the boiler call-for-heat or the thermal actuator to the NO / NC terminals, choosing NO (normally open) or NC (normally closed) to match the connected device.

Installation should be carried out by a qualified electrician, and the connected load must never exceed the rated output. A dedicated wiring diagram ships with every order, and our engineers are available by WhatsApp for remote commissioning support — including help selecting NO versus NC and pairing the unit to your WiFi network.

Compatibility with SunAura Heating Systems

The knob thermostat is the natural control partner for the full SunAura heating range: electric heating film, heating cables, heating mats, hydronic underfloor systems and the room heating products we manufacture alongside them. When you buy film, cable, mat or a hydronic loop from SunAura, we can pre-configure the thermostat’s temperature limits, floor-sensor selection and weekly programme to match your exact installation, and offer the complete package — heating element, thermostat, sensors and accessories — from a single factory source with one warranty. Whether your project runs on 16 A electric heating or a 3 A boiler/actuator dry contact, the knob version gives your installers a familiar knob-and-screen interface customers enjoy using.

Quality, Certification & Support

SunAura Thermal has manufactured heating controls and electric heating products since 2008 from our Qingdao factory, operating with ISO-style quality management and in-line testing on every thermostat batch. The knob thermostat is CE compliant, rated IP20, and QC PASS tested before shipment. We support distributors and OEM customers with private-labelled branding, custom programmes, packaging design and drop-ship logistics to more than 50 countries. Every unit carries a two-year warranty, with direct after-sales support from SunAura engineers by WhatsApp — spare parts, configuration help and commissioning guidance in English.

FAQ

1. How do I operate the rotary knob thermostat?

Turn the knob left or right to lower or raise the set temperature; press the knob briefly to switch the heating on and off. Use the MODE touch key to cycle between manual, automatic (weekly programme) and eco modes, and the CLOCK touch key to set the time and weekday. All changes save automatically and are kept in memory after power loss.

2. What is the difference between the 16 A and the 3 A version?

The 16 A resistive version (terminals L / N / N1 / L1) switches electric heating — heating film, cable, mat, tile or panels — directly. The 3 A version (terminals L / N / NO / NC) is a volt-free dry contact that does not switch the load itself; it calls for heat from a gas or wall-hung boiler or switches thermal actuators on a manifold. Choose the version that matches your heating system, and specify NO or NC according to the connected device.

3. How does the weekly app programming work?

In the companion app you set separate schedules for weekdays (Mon–Fri) and the weekend (Sat–Sun), and choose a 5+2, 6+1 or full 7-day mode. Each day can hold up to six time periods, each with its own start time and target temperature. Once the schedule is saved, the thermostat follows it automatically, switching between comfort and setback temperatures without any on-device action.

4. What happens to my settings during a power cut?

Settings, including the weekly programme, set temperatures and child-lock state, are stored permanently in the device memory. When power returns, the thermostat resumes the last programme and current time setting — no re-programming is needed.

5. How do I connect the external floor sensor?

Connect the external NTC floor sensor (10 kΩ, β = 3950) to terminals 5–6 on the back of the thermostat, then select the external sensor in the device or app settings. Floor sensing is recommended for electric underfloor heating to protect the floor build-up from over-temperature.

6. What do the ±1 °C accuracy and the switch-on differential mean?

Measurement error is held to ±1 °C, and the reading can be calibrated by an offset of −9 to +9 °C against a reliable reference thermometer. The switch-on differential is the temperature band (adjustable 0.5–5 °C) that the room must fall before the output restarts — a wider differential prevents frequent on/off cycling and saves wear on the relay and the heating system.

7. How does the child lock work?

Activate the child lock from the device keys or the app; a lock icon appears on the LED screen and turning or pressing the knob no longer changes any setting. Deactivate it the same way when you need to adjust the heating. The screen brightness can also be lowered independently for quiet bedrooms.

8. What is the warranty and after-sales support?

Every SunAura WiFi Smart Knob Thermostat includes a 2-year warranty and direct after-sales support from SunAura — spare parts, configuration help and commissioning guidance by WhatsApp, in English, from our Qingdao factory team.

Looking for a knob thermostat for underfloor heating that occupants actually enjoy using, or a rotary WiFi thermostat with NO/NC dry contact for boilers that adapts to almost any manifold actuator on the market? The SunAura WiFi Smart Knob Thermostat pairs a precise rotary dial with full app scheduling — turn to adjust, press to power on/off — and covers electric underfloor heating (16 A) as well as boilers and thermal actuators (3 A, normally open or normally closed). Below are our factory-direct purchasing terms and the long-tail questions installers ask most.

How to Buy the Knob Thermostat — Factory-Direct Pricing

SunAura Thermal supplies the knob thermostat directly from our Qingdao factory to homeowners, installers, heating distributors and private-label brands in 50+ countries. Wholesale pricing is tiered by finish (black or white), variant (16 A electric or 3 A NO/NC dry contact) and quantity, and MOQ depends on your project mix — send us your room list and we return a same-day quotation. Bulk discounts run from trial orders up to full-container shipments, EXW or FOB terms are quoted on request, and CE documentation is supplied with every order. Evaluation samples are available before bulk purchase; the sample and courier charge is confirmed per enquiry, and drop-ship parcels can be sent directly to your installation crew.

Request a quote by contacting our sales team or messaging us on WhatsApp, and tell us whether each zone switches electric film, cable or mat directly, or calls for heat from a boiler / manifold actuator. The full controller line-up is listed in our thermostats and controls category — pair the knob model with, for example, our all-black glass touch WiFi thermostat for feature rooms, or the K2M programmable floor heating thermostat on larger 16 A/25 A electric circuits.

Customization & Commissioning Support

OEM and distribution customers can order knob thermostats with private-labelling, custom faceplate finishes and weekly programmes pre-matched to their local routine — the app accepts 5+2, 6+1 or full 7-day schedules with up to six periods per day, so a pre-loaded template saves your installers on-site configuration time. Engineers are available by WhatsApp for remote commissioning, including help choosing NO versus NC dry-contact wiring and pairing the unit over 2.4 GHz WiFi. Because the thermostat works with Amazon Alexa and Google Assistant, app-link setup notes for voice control can also be included in your own installation manual on request.

More Frequently Asked Questions

9. Which should I pick — the 3 A NO or the 3 A NC dry-contact version?

Choose NO (normally open) or NC (normally closed) to match the connected boiler or manifold thermal actuator: most standard room thermostats use NO call-for-heat wiring, while some actuators and safety circuits expect the NC contact. If you are unsure, send us the boiler or actuator model and we will confirm the correct contact type before dispatch. The 16 A resistive version (terminals L / N / N1 / L1) is a separate variant for electric heating — never connect a mains load across the 3 A dry contact.

10. How does the rotary knob compare with a touch screen for elderly users?

The knob is deliberately tactile: turn to change the set temperature in fine steps, press to switch the heating on or off, with MODE and CLOCK handled by two touch keys on the panel. Because adjustment is mechanical rather than tapping glass, many homeowners — especially elderly users or guests in hotels — find one-handed, by-feel adjustment easier, while the dimmable LED screen keeps bedrooms quiet at night. For projects that prefer glass surfaces on feature walls, our touch-screen alternative sits in the same range.

11. Can the knob thermostat control electric underfloor heating with a floor sensor?

Yes. On the 16 A electric version, connect the external NTC floor sensor (10 kΩ at 25 °C, β = 3950) to terminals 5–6 and select floor-sensor control in the app; the thermostat then protects the floor build-up from over-temperature, with the adjustable switch-on differential (0.5–5 °C) preventing frequent relay cycling. Start your project enquiry by talking to our OEM sales desk, check delivery and commissioning details on our main FAQ page, and view hydronic and electric deployments in our applications gallery. For hard-wired boiler rooms without a neutral at the wall, our wireless boiler thermostat system is the retrofit alternative.

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