ST2305 wired underfloor heating and gas boiler thermostat with blue LCD

Wired Thermostat 230V Wired Thermostat Gas Boiler Thermostat Underfloor Heating Thermostat Non-Programmable Thermostat

Hot Selling 230V Non-programmable Wired Underfloor Heating Gas boiler Thermostat HVAC

Name: Hot Selling 230V Non-programmable Wired Underfloor Heating Gas boiler Thermostat HVAC
Brand: Smart Therm

This is ST2305 in its underfloor heating configuration, a wired 230V non-programmable thermostat showing room and set temperature on one LCD. A button battery backup keeps the settings through a power failure, and the unit is designed to work with almost all standard electric underfloor heating systems. Sensing is by NTC, and operation is a simple HEAT / OFF / COOL switch with a manual setpoint.

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Key Benefits

Button battery backup keeps settings through a power failure
Designed for almost all standard electric underfloor heating systems
Room and set temperature shown together, so users can see both
NTC sensing rather than a bimetal element
Low battery indicator before control is affected

Problems It Solves

Settings lost at every power cut
Underfloor systems paired with controls not designed for them
Users unable to see the room temperature alongside the setpoint
Batteries failing silently

Who It Is For

Electric underfloor heating suppliers
Heating installers on mixed underfloor and boiler work
Merchants stocking a wired 230V manual stat
OEM buyers needing a settings backup feature

Technical Features

Wired 230V non-programmable control
HEAT / OFF / COOL mode switch with simple manual adjustment
LCD showing both room temperature and set temperature
Button battery backup to save settings during power failure
NTC sensor
Blue backlight with low battery indicator
Designed for almost all standard electric underfloor heating systems
ABS and PC housing, 400 g, supplied with one instruction sheet

Specifications

Model	ST2305
Backlight	Blue
Material	ABS+
Weight	400g
Package Included	1Wired Thermostat 1Instruction

Specifications are taken from the manufacturer data for this model. Confirm the exact configuration with us before you order.

Application Scenarios

Electric underfloor heating in bathrooms, kitchens and living rooms
Gas boiler zones controlled from one room
HVAC installations with a simple manual setpoint
Buildings with frequent supply interruptions

Quality Control

Settings retention tested through a simulated power interruption
NTC sensing checked against a reference probe
High voltage insulation test on every 230V unit

Customisation Options

Backlight colour on volume orders
Front label, logo and housing marking
Setpoint range narrowed for managed property
Instruction sheet and carton in the buyer's language

Comparison

How It Compares

The slider switch ST2305 configuration

This version is set up for electric underfloor heating and adds a button battery backup that preserves settings through a power failure.

Programmable underfloor stats such as C7

ST2305 has no schedule, which is what specifiers want when heating times are set centrally or the system runs continuously.

Use guide

Installing And Commissioning

Step 1

Isolate the 230V supply and confirm the circuit is dead

Step 2

Check the underfloor heating load against the thermostat rating

Step 3

Mount the backplate clear of the heated area and direct sun

Step 4

Land the switched conductor and set the mode switch to HEAT

Step 5

Interrupt the supply briefly and confirm the settings are retained

Answers