Smart Thermostat Comparison · UK 2026
Honeywell Home T6R-HW vs Nest Thermostat E

Specs, pros and cons compared side by side

Both the Honeywell Home T6R-HW and the Nest Thermostat E are smart thermostats. 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; Nest specs come from Google’s own pages.

Quick verdict

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Honeywell Home T6R-HW

Pick it for: Controls stored hot water on Sundial S, Y and W plan systems (the Thermostat E: no hot water control for systems with a separate hot water tank) · Receiver box runs on 230V mains (the Thermostat E’s Heat Link E: AA Energizer Lithium L91 batteries)

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Nest Thermostat E

Pick it for: Google says Heat Link E can be a DIY install or fitted by a Nest Pro; turn the power off first and use a qualified heating engineer if you’re unsure (the T6R-HW: Resideo says it must be installed by a competent person) · Dual-band Wi-Fi on 2.4 and 5GHz (the T6R-HW: 2.4GHz only) · Auto-Schedule learns from the temperatures you set (not listed for the T6R-HW)

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Quick comparison

Spec Honeywell Home T6R-HW Nest Thermostat E
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		 Heat Link E (wireless only)
Hot water on combi boilers only
OpenTherm or On/Off
Built-in rechargeable battery
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
  • OpenTherm and 24-230V on/off support

Cons

  • Receiver box must be installed by a competent person
  • 2.4GHz Wi-Fi only
  • Not for electric heating (240V)
Nest Thermostat E

Pros

  • Google says Heat Link E can be a DIY install or fitted by a Nest Pro (use a qualified heating engineer if you’re unsure)
  • Heat Link E goes where your old thermostat was and has its own temperature sensor
  • OpenTherm support
  • Heat Link E has a button for manual heating if the connection drops

Cons

  • No hot water control for systems with a separate hot water tank
  • Heat Link E needs AA Energizer Lithium L91 batteries; Google warns alkaline ones drain quickly

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Which should you buy?

Why choose the Honeywell Home T6R-HW

  • Controls stored hot water on Sundial S, Y and W plan systems (the Thermostat E: no hot water control for systems with a separate hot water tank)
  • Receiver box runs on 230V mains (the Thermostat E’s Heat Link E: AA Energizer Lithium L91 batteries)
Why choose the Nest Thermostat E

  • Google says Heat Link E can be a DIY install or fitted by a Nest Pro; turn the power off first and use a qualified heating engineer if you’re unsure (the T6R-HW: Resideo says it must be installed by a competent person)
  • Dual-band Wi-Fi on 2.4 and 5GHz (the T6R-HW: 2.4GHz only)
  • Auto-Schedule learns from the temperatures you set (not listed for the T6R-HW)

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