Smart Thermostat Comparison · UK 2026
Honeywell Home T6R-HW vs Salus IT800WIFI Smart Thermostat

Specs, pros and cons compared side by side

Both the Honeywell Home T6R-HW and the Salus IT800WIFI Smart Thermostat are smart thermostat kits with a receiver wired to the boiler. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. Honeywell Home specs come from Resideo’s own UK pages and guides; Salus specs come from Salus’s own pages.

Quick verdict

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Honeywell Home T6R-HW

Pick it for: Two channels, for heating and stored hot water (the IT800WIFI: a single-channel relay; Salus does not state hot water) · OpenTherm as well as 24-230V on/off (OpenTherm not listed for the IT800WIFI) · Apple Home, per Resideo’s T6R-HW product pages (not listed for the IT800WIFI)

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Salus IT800WIFI Smart Thermostat

Pick it for: Heating and cooling: Salus says it’s designed for both (cooling not listed for the T6R-HW) · 750mAh rechargeable battery, charged on the included dock (the T6R-HW wall-mounted kit: a 230V wall power supply) · Add SP600 smart plugs or SR600 smart relays, up to 16 devices in total (not listed for the T6R-HW)

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Quick comparison

Spec Honeywell Home T6R-HW Salus IT800WIFI Smart Thermostat
Key specs from our review Wireless receiver box
Heating and hot water
Resideo app, 2.4GHz Wi-Fi
OpenTherm or 24-230V on/off
Large touchscreen		 IT800TX thermostat + WZ600 receiver
Gateway built into the receiver
Rechargeable 750mAh battery
Heating or cooling
Boiler Plus compatible
Honeywell Home T6R-HW

Pros

  • Heating and stored hot water from one thermostat
  • Receiver box and thermostat come pre-bound
  • Works as a programmable thermostat without Wi-Fi
  • Table-stand or wall-mounted kit
  • OpenTherm and 24-230V on/off support

Cons

  • Receiver box must be installed by a competent person
  • Not for electric heating (240V)
Salus IT800WIFI Smart Thermostat

Pros

  • Pre-paired thermostat and receiver that work locally without the internet
  • Gateway built into the receiver, so there is no separate gateway
  • “Subscription-free access to Premium Lite app”, in Salus’s words
  • Heating and cooling control

Cons

  • Single-channel relay, so it controls one circuit
  • The receiver must be installed by a qualified person
  • Salus does not state hot water, OpenTherm or Apple Home support

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Which should you buy?

Why choose the Honeywell Home T6R-HW

  • Two channels, for heating and stored hot water (the IT800WIFI: a single-channel relay; Salus does not state hot water)
  • OpenTherm as well as 24-230V on/off (OpenTherm not listed for the IT800WIFI)
  • Apple Home, per Resideo’s T6R-HW product pages (not listed for the IT800WIFI)
Why choose the Salus IT800WIFI Smart Thermostat

  • Heating and cooling: Salus says it’s designed for both (cooling not listed for the T6R-HW)
  • 750mAh rechargeable battery, charged on the included dock (the T6R-HW wall-mounted kit: a 230V wall power supply)
  • Add SP600 smart plugs or SR600 smart relays, up to 16 devices in total (not listed for the T6R-HW)

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