HC90 WiFi Stat

A flexible WiFi enabled thermostat with companion App for easy remote heating control

Category: HC90 WiFi Stat

Remote operation via your smart phone

Heat Mat's HC90 WiFi thermostat offers remote operation from anywhere in the world via its companion App while the touchscreen also allows easy in-home control. This electric underfloor heating thermostat can be used to control any of Heat Mat's underfloor heating systems.

The HC90 provides fully-automated and flexible underfloor heating control to suit the owner's daily schedule. It provides fully automated and flexible underfloor heating control to suit the owner's daily schedule.

The thermostat is supplied with various lifestyle modes including holiday, comfort, frost protection and boost for an hour of full-power warmth. The wireless App control enables all aspects of the operation of the thermostat to be carried out via the simple to use App. You can choose to individually control a single thermostat, or combine multiple thermostats to create heating zones.

HC90 WiFi Features

  • Easy to use, quick to navigate
  • Remote access and control via simple to use App
  • Connects directly to wireless network, no gateway required
  • Simple to set-up
  • Features useful functions including holiday mode, temporary override mode and hold mode
  • See energy use over a week, a month or a year
  • Switch the thermostat to manual for the simplest control
  • Floor and room temperature sensors
  • Controls up to 16 Amp of underfloor heating directly without the need for a contactor
  • Lot20 compliant
  • Covered by a 1-Year Warranty

Also available in White - HC90-WHT-WIFI

Simple Connection

The controller is designed to be straightforward to connect to your wireless network via the App and it does not require a separate hub. If a wireless connection is not available for any reason you can still access all functions of the thermostat through the conventional touch screen.

App control

Through App control you can monitor and adjust your heating system from anywhere in the world and you can also review the energy usage of your system at any time.

Sensor settings

The thermostat has three sensor options. In most circumstances the thermostat will operate on the room temperature with floor temperature limitation, which prevents the floor from overheating. For times when the thermostat is outside of the room being heated it is operated on floor temperature only, and for controlling other forms of heating the thermostat can be used on room temperature only.

Lifestyle Modes

The thermostat offers a number of 'modes' for easy temperature control. These modes override the programmed heating schedule and provide the homeowner with a quick way to adjust the thermostat, whilst retaining their day-to-day heating settings.

Hold mode - This will override the current heating program and allow manual adjustment of the target temperature for up to 24 hours. This might be used if the owner wanted to heat a room, that might normally be unheated, for a short time.

Temporary override mode - the underfloor heating temperature you set will stay as the new target temperature overriding the heating schedule. At the end of that time period, the thermostat returns to the ‘default schedule’ or programmed operation. This could be used when returning to a cold room to warm the space as quickly as possible.

Frost protection mode - used when heating is not needed but the temperature must be kept above freezing. This is usually used in holiday cottages, outbuildings or properties that may be left unattended for long periods of time and is accessed through the advanced settings menu.

Holiday mode - this allows the heating to be set to a minimum while the homeowner is away on holiday, saving both energy and money. Holiday start and end dates must be set and the thermostat will ensure that the floor is kept above freezing and the home is warm when they return.

HC90 WiFi Thermostat Technical Data

  • Supply Voltage: 85-265 V AC + 10% 50/60Hz
  • Output relay: 2019 Max 15A, 2020 onwards Max 16A
  • Interrupter: 1-pole, 16A
  • Temperature range: +5 / +40°C
  • Floor limit range: +20 / +45°C
  • Heating schedule: 4-event program
  • Wireless: Yes
  • Battery backup: 1 year
  • Ambient temperature: 0/+40°C during operation
  • On/Off differential: 0.5°C
  • Housing: IP21
  • External sensor type: NTC (12 K?) 3m
  • Dimensions (H/W/D): 82/82/40mm (23mm depth)
  • Display: 176x220 pixel TFT – Resistive touch
  • WiFi: 2.4Ghz


Heating systems must always be controlled by a suitable electric underfloor heating thermostat with floor temperature limitation. Heat Mat thermostats are rated to 16 Amps, and if a system exceeds this loading a suitably rated contactor should be used. The circuit must be protected by a 30mA RCD and suitably rated fuse or circuit breaker.


Control the system via an App - scan to download

Product Dimensions

Product Code Description TSI Code GTIN No.
HC90-WHT-WIFI Wi-Fi touch-button thermostat – 15A 408178000 5707359815389
HC90-BLK-WIFI Wi-Fi touch-button thermostat – 15A 425154751 5707359815396