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ThermoSphere Bluetooth Programmable Thermostat - BT21


RRP: £190.80


3-4 Working Days Approx.

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Shipping: £7.95

Key Features
  • Control your underfloor heating with a simple manual dial or connect to bluetooth
  • Simple manual temperature dial
  • Easy to program via the bluetooth app
  • It can be used for snow melting applications
  • 3 years warranty from the manufacturer
SKU Code: QS-V109417

MFC Code: BT21

BT21 Details

ThermoSphere Bluetooth Programmable Thermostat is designed to give precise results and accurate control over your spaces. This thermostat has a sleek, contemporary design that will fit in with the aesthetic of your modern home.

It is designed to control your underfloor heating with a simple manual dial or via Bluetooth to ensure your home is always at the desired temperature upon arrival and when you're away. It works with the help of an ambient temperature sensor and an external floor temperature sensor. The product requires a 25mm deep back box for installation and saves on energy bills.

  • Size: 86 x 10 x 86mm [Width x Depth x Height].
  • Built-in ambient temperature sensor.
  • External floor temperature sensor.
  • Copy and paste your settings and schedule between multiple thermostats.
  • Setback signal terminal for BMS applications.
  • Technical Details:.
  • Supply voltage: 230V 50Hz.
  • Maximum load: 16A.
  • Connectivity: Bluetooth 4.2.
  • Ambient Temperature: 5 degrees Celcius to 35 degree Celcius.
  • Sensor rating: NTC 10k ohm at 25 degree celcius. Also works with NTC 2k, 12.5k, 15k, 33k.
  • Protection rating: IP21.
  • Mounting: 25mm deep back box.
  • Outdoor wireless humidity sensor sold separately [See option below].

Additional Info & Downloads

Customise Your Product

Outdoor Wireless Humidity Sensor
Outdoor Wireless Humidity Sensor

Simply control your outdoor heating, by combining the BT21 with the new wireless temperature and humidity sensor

Total: £124.37 3-4 Working Days Approx QS Supplies
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At QS Supplies, we use trustworthy carriers for deliveries across UK, Scotland and Ireland. We also follow an up-to-date tracking system to keep you posted on the status of your orders. Delivery dates are approximate, and therefore, we suggest you do not schedule any installation work until you have received the items. To learn more about our delivery service, click here. Please do not book Tradesmen until the items are safely received and thoroughly checked.


Before travelling for collections, please wait for a formal communication from us confirming your order is ready. For urgent orders, we recommend you call ahead to check lead times. Our Sales Team can be reached at 0116 251 0051, Monday to Friday from 8.30 am to 5.00 pm.


For complete information on returns, click here.

Stock Availablity

Please note that stock availability dates are subject to change and are not updated on Sundays. Updates are made every morning, so availability can vary. For the most current stock details, please contact us at 0116 251 0051.

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