Menu

Honeywell Home Prestige IAQ Thermostat with RedLINK

Honeywell Home / THX9421R5021WW/U, YTHX9421R5085WW/U, YTHX9421R5101WW/U, YTHX9421R5127WW/U, YTHX9421R7001WW/U

Last checked

Amazon links here are plain search links and earn this site no commission. Disclosure

Does the Honeywell Home Prestige IAQ Thermostat with RedLINK work with HomeKit, Alexa, and Google Home?

The Honeywell Home Prestige IAQ Thermostat with RedLINK is a two-wire color touchscreen thermostat that reaches the internet through a RedLINK Internet Gateway and works with Alexa and Google Assistant. It suits Google Home and Alexa users through an integration (the maker's hub).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Unknown
Unknown
Google Home
Yes[1]
Proprietary + hub, via integration
Alexa
Yes[1]
Proprietary + hub, via integration
SmartThings
Unknown
Unknown
Home Assistant
Unknown
Unknown

Key facts

Honeywell Home Prestige IAQ Thermostat with RedLINK facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[1]
ConnectionRedLINK[1]
NeedsRedLINK Internet Gateway (THM6000R7001/U) for remote access[1]
StagesUp to 4 heat/2 cool heat pump, up to 3 heat/2 cool conventional[1]
PowerBattery operated[1]
AlexaYes[1]
Z-Waveunknown

Integration paths

How the Honeywell Home Prestige IAQ Thermostat with RedLINK connects

1 pathHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Proprietary + hubHUBRedLINK Internet Gateway (THM6000R7001/U) for remote access[1]unknownunknown
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Cite this page

Honeywell Home Prestige IAQ Thermostat with RedLINK. Smart Home Canon. https://smarthomecanon.com/devices/honeywell-home-prestige-iaq-thermostat-with-redlink. Last checked 2026-10-16.

Sources

  1. [1]
    MFRhoneywellhome.com / Honeywell Home: Prestige IAQ Thermostat with RedLINK product page
    Accessed Back to text