01
Remote temperature control
View the room temperature and adjust the setpoint from the GEYER Smart app.
GEYER SMART · GS-THWH · WI-FI ROOM THERMOSTAT
Comfort at the right temperature. In white or black.
A wall-mounted Wi-Fi room thermostat for hydronic heating systems, with remote temperature control, weekly schedules and manual or ECO operation through GEYER Smart.
Choose colour
5–37 °CSetting range
0.1 °CDisplay precision
5 AResistive load
Remote temperature controlGEYER Smart
Selected modelGS-THWH-W
CONNECTED ECOSYSTEM
Amazon Alexa
Google Home
Tuya Smart
Smart LifeTEMPERATURE · COMFORT · SCHEDULING
The desired temperature, wherever you are.
GS-THWH combines room-temperature control, weekly programming and a clean touch interface in one wall-mounted thermostat.
02
Weekly schedules
Create different temperature schedules for each day of the week through the app.
03
Manual & ECO modes
ECO mode provides a 20-minute operating cycle each time it is activated.
04
Local touch control
Adjust temperature and mode locally, with display lock and temperature calibration settings.
TWO COLOURS · ONE THERMOSTAT
Choose the finish that fits your space without changing any function.
GEYER SMART APP
Temperature control from your phone.
View the room temperature, change the setpoint and organise weekly heating schedules from one familiar interface.
APPLICATIONS
Comfort for hydronic heating systems.
01
UNDERFLOOR HEATING
Control compatible hydronic underfloor heating systems according to the room temperature.
02
HYDRONIC RADIATOR HEATING
Maintain the desired room temperature in compatible hydronic radiator heating installations.
03
HEAT PUMP
Use the thermostat with a compatible hydronic heating system supplied by a heat pump.
04
HOLIDAY HOME
Adjust the temperature remotely and prepare the property before arrival.
Compatibility with the heating system, control input and electrical installation must be assessed by a qualified electrician.
TECHNICAL SPECIFICATIONS
Designed for precise room-temperature control.
A surface-mounted Wi-Fi thermostat for compatible hydronic heating systems, available in white and black.
CEREDWEEE2 years
Product codesGS-THWH-W (white) · GS-THWH-B (black)
Power supply220 V AC
Standby power consumption≤1 W
Resistive loadOne load, up to 5 A
Temperature setting range5–37 °C
Measurement accuracy±0.1 °C
Temperature hysteresis0.5–5 °C
Temperature calibration−9.9 °C to +9.9 °C
Operating environment0–55 °C · <95% RH, non-condensing
Operating modesManual · ECO · OFF
Wi-Fi2.4 GHz
MountingSurface mounted
ConnectionTerminal block
Dimensions113 × 113 × 22 mm
MaterialPC + ABS
Ingress protectionIP20
ColoursWhite · black
Warranty2 years
ComplianceCE · DoC: LVD / EMC / RED / RoHS
INSTALLATION & PAIRING
Three essential steps.
01
Installation
Have the thermostat connected to the power supply and the compatible heating control input by a qualified electrician, with the supply isolated.
02
App
Download GEYER Smart from the App Store or Google Play, enable Bluetooth and connect the phone to a 2.4 GHz Wi-Fi network.
03
Pairing
During normal operation, press and hold the down arrow and centre button for about 3 s until the Wi-Fi icon flashes, then add the thermostat in the app.
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ELECTRICAL SAFETYHeating-system compatibility, output-contact selection, protection and wiring must be assessed and completed by a qualified electrician. Isolate the supply before installation.
WIRING & DISPLAY
Heating output and thermostat indications.
The VCOM/VNO/VNC output is a voltage-free relay contact. It can switch the live conductor when L is connected to VCOM. Connect it according to the wiring diagram and the heating-system requirements.
FREQUENTLY ASKED QUESTIONS
The essential answers.
What is the difference between GS-THWH-W and GS-THWH-B?+
Only the colour, product code and packaging differ. GS-THWH-W is white and GS-THWH-B is black; their functions and technical specifications are identical.
Which heating systems is the thermostat intended for?+
It is intended for compatible hydronic heating systems, including hydronic underfloor heating and radiator systems using oil, natural gas or a heat pump.
Can I create weekly schedules?+
Yes. Weekly temperature schedules can be created through the GEYER Smart app.
Does it connect to 5 GHz Wi-Fi?+
No. GS-THWH connects exclusively to a 2.4 GHz Wi-Fi network.
Can it be controlled without the app?+
Yes. Temperature and operating mode can also be adjusted locally using the touch controls.
Who should install the thermostat?+
Electrical connection and assessment of compatibility with the heating system must be completed by a qualified electrician.
VIDEO
Product videos.
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Video content coming soon
TESTIMONIALS
Everyday experiences with GS-THWH.
Temperature control for homes and holiday properties.
01“
I use these thermostats in homes with radiators where the customer wants to replace an old thermostat. Installation is practical, and smartphone control adds real convenience.
KostasElectrician
02“
I created a weekly heating schedule so the house warms up before I return from work. If my plans change, I can adjust the temperature from my phone.
EleniHomeowner
03“
With GS-THWH I can adjust the heating before guests arrive. The home is ready without me having to be at the property.
PanagiotisAirbnb owner
DOCUMENTATION GS-THWH-W / B