LCD WIFI RF Programmable Gas Boiler thermostat
STN855W is the WiFi version of our universal platform. It keeps the same staging as the wired STN855, up to 2 heat and 2 cool on conventional systems and up to 3 heat and 2 cool on heat pumps, and adds app control over WiFi. Programming runs 7 day or 5/1/1 with auto changeover, and the unit takes either 24V power or AAA batteries.
Key Benefits
- App control lets landlords and facility teams adjust rooms they are not standing in
- Universal staging means one connected model covers conventional and heat pump equipment
- Auto changeover removes the seasonal mode switch from the occupant's list of jobs
- Runs on 24V or AAA batteries, so it retrofits into wiring without a common conductor
- Blue backlit LCD keeps local control available when the network is down
Problems It Solves
- Heating a property before arrival without leaving it on all week
- Site visits just to change a setpoint
- Holding separate connected models for heat pump and conventional systems
- Losing control of the room when the internet connection drops
Who It Is For
- Smart home integrators adding heating control to an existing installation
- Holiday let and short stay operators
- OEM buyers who need a WiFi model alongside a wired range
- Underfloor heating suppliers offering a connected upgrade option
Technical Features
- Universal WiFi control, up to 2 heat 2 cool conventional
- Up to 3 heat and 2 cool on heat pump systems
- 7 day or 5/1/1 programmable schedule
- Auto changeover between heating and cooling
- Power supply 24V or AAA batteries
- Blue backlit LCD with local control
- Anti-flammable PC and ABS housing in white
- CE and RoHS, suitable for room underfloor heating and indoor installation
Specifications
| Model | STN855W |
| Power Supply | 24V or AAA BATTERIES |
| Backlight | Blue |
| Color | White |
| Material | Anti-flammable PC +ABS |
| Application | Room Underfloor Heating Thermostat/Indoor |
| Function | Floor Heating Systerm Package Carton packing |
| Feature | Save Energy |
| Certification | CE RoHS |
Specifications are taken from the manufacturer data for this model. Confirm the exact configuration with us before you order.
Application Scenarios
- Underfloor heating in homes where the owner travels and wants remote control
- Holiday lets pre-heated before guests arrive
- Small commercial sites managed from one office
- Mixed heat pump and conventional estates needing one connected control
Quality Control
- Every unit is joined to a test access point and the app link is confirmed
- Staging outputs are exercised on the line before packing
- Firmware version recorded against the production batch
Customisation Options
- App branding and cloud account setup as part of the ODM package
- Firmware defaults and schedule preset to the buyer's specification
- Housing colour, logo and carton artwork
- Voice assistant integration on request, including Alexa
How It Compares
Installing And Commissioning
Step 1
Mount the unit and wire for 24V, or fit AAA batteries where no common wire exists
Step 2
Select conventional or heat pump staging in the installer menu
Step 3
Join the thermostat to the 2.4 GHz WiFi network using the app
Step 4
Set the 7 day or 5/1/1 schedule and enable auto changeover
Step 5
Confirm each heating and cooling stage responds from both the app and the keypad
LCD WIFI RF Programmable Gas Boiler thermostat: Buyer Questions
Does STN855W work if the internet goes down?
Yes. The schedule and the local keypad keep running. Only remote app access is lost until the connection returns.
How many stages does it control?
Up to 2 heat and 2 cool conventional, and up to 3 heat and 2 cool on heat pump systems.
Can it be voice controlled?
Some of our existing products can be controlled using the Alexa system. Tell us which assistant you need and we will confirm for your project.
What power supply does it need?
24V or AAA batteries.
Can you build the app under our own brand?
Yes. App branding and firmware customisation are part of our ODM service. Contact us with the requirement and we will scope it.
Which approvals does it carry?
CE and RoHS. Ask us for the report covering your destination market before you order.
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Quote The LCD WIFI RF Programmable Gas Boiler thermostat
Send us the quantity, the destination market and any branding or firmware changes you need. Samples ship within 30 days and bulk orders in 15 to 45 days.