Description
Q40 wired WiFi thermostat for underfloor heating and boiler control – LCD and touch controls
Quicksmart Q40 is a wired WiFi thermostat for underfloor heating, boiler control and compatible heating or cooling systems. It is designed for recessed wall-box mounting and permanent mains power.
WiFi and Smart Life are integrated directly into the thermostat, so no separate Receiver or e-Hub is required. Temperature and schedules can be controlled locally or remotely.
The glass front panel, LCD screen and capacitive touch controls offer a clean interface. Installation requires at least three wires for power and switching.

What you get with the Q40 wired WiFi thermostat
Q40 combines local control, WiFi and Smart Life in one device.

1× Q40 Thermostat
Wired WiFi thermostat with LCD display, capacitive touch controls, built-in Smart Life and recessed mounting.
Q40 combines local control, wired switching and Smart Life
The thermostat measures room temperature, switches the heating system by wire and connects directly to Smart Life.
The thermostat measures room temperature
Q40 compares the measured room temperature with the selected setpoint.
Heat demand is transmitted by wire
Q40 is permanently powered and switches the connected heating system through its wired output.
Direct smart control
WiFi is built into the thermostat, so temperature and schedules can be controlled directly from Smart Life.


Q40 wired WiFi thermostat with LCD display, touch controls and recessed mounting
Q40 combines an LCD display, glass front panel, capacitive touch controls and direct Smart Life connectivity in a permanently powered recessed thermostat.
Permanent mains power removes the need for batteries, while recessed mounting provides a clean wall installation.
The NTC3950 10K sensor monitors room temperature and the 5°C–45°C range supports compatible heating and cooling applications.
Q40 can be used for standalone boiler control or integrated into a Quicksmart Q10 wired zoning system.
Q40 thermostat specifications
Recessed mounting and Q40 wired system integration
Q40 is permanently powered and requires wiring for power and switching.

Dimensions and recessed installation
Q40 measures 86 × 86 × 16 mm and is designed for recessed wall-box mounting.
Integration into underfloor heating zoning
In a Quicksmart Q10 zoning system, Q40 thermostats can be wired to the Q10 Controller, which manages manifold actuators, the circulation pump and boiler demand.

Which Quicksmart thermostat is right for your project?
Key differences between wireless and wired Quicksmart thermostat models.
Q10 Wired
Q20 Wireless
Q30 Wireless
Q40 Wired
Q50 Wired
See the Q40 thermostat in use
Product overview and main functions.
Quicksmart Q40 Wired WiFi Thermostat
Overview of the wired thermostat, local interface and direct Smart Life control.
Explore Quicksmart thermostats
Compare wireless and wired thermostat options for boilers and underfloor heating systems.
Wireless / Wired Heating Control Installation Manuals
Choose the correct manual for your Quicksmart Q20 Wireless or Q10 Wired system and download the PDF installation and configuration guide.
Q20 Wireless Heating Control
Wireless Thermostats – Smart WiFi
Q10 Wired Heating Control
Wired Thermostats – Smart WiFi





















