US catalogue
Honeywell Home / Smart thermostats
A Matter-certified Honeywell Home thermostat that requires a C wire and supports up to 2H/2C conventional or 2H/1C heat pump systems.
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This is a published compatibility list, not an installation guarantee. Use the manufacturer's compatibility checker and your actual wiring before buying.
Zero included does not establish that sensors are unsupported; some thermostats do not support any remote sensor at all.
Box contents are not listed and no room sensor support is documented.
Matter control may still require the maker's app for setup. Matter is not the same as a native Alexa, Google or HomeKit integration.
Footnoted as Matter Certified with a Matter supplement for the QR code.
The page does not list box contents. A FREE C-Wire Adapter online offer is mentioned as not shipping to Canada; whether this purchase includes an adapter was not established. The page showed Unavailable and a backorder notice; price and availability were not verified.
Select: X2S Smart Thermostat, SKU RTH2CWF/U, white, single thermostat sold on honeywellhome.com in the US.
View at Honeywell Home (Resideo) — X2S Smart Thermostat RTH2CWF/U, white (Honeywell Home, US); opens in a new tabThe link may open several packages. Check current price and availability with the seller. Opens in a new tab.
Wi-Fi connected 24 V low-voltage thermostats sold new in the US. Line-voltage thermostats, pro-only equipment interface modules, utility-program packages and measured energy savings are outside this catalogue.
Open a field explanation or source for its conditions.
| Compare the details | X2S Smart Thermostat RTH2CWF/U, white (Honeywell Home, US) |
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| US purchase package | X2S Smart Thermostat, SKU RTH2CWF/U, white, single thermostat sold on honeywellhome.com in the US. The page does not list box contents. A FREE C-Wire Adapter online offer is mentioned as not shipping to Canada; whether this purchase includes an adapter was not established. The page showed Unavailable and a backorder notice; price and availability were not verified. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Documented HVAC supportThe manufacturer's published supported-system and stage statement, kept close to its wording. This is a published compatibility list, not an installation guarantee. Use the manufacturer's compatibility checker and your actual wiring before buying. | Up to 2 heat/2 cool conventional, up to 2 heat/1 cool heat pump with electric backup, hot water heat, forced air (gas, oil, or electric); does not work with electric baseboard heat (120-240V).Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Heat pump stagesPublished heat pump compressor and auxiliary or emergency heat stage support. Heat pump staging differs from conventional staging. Dual-fuel and balance-point behavior must be confirmed separately for your equipment. | Up to 2 Heat/1 Cool heat pumps with electric backup; Emergency Heat mode and a heat pump failure alert are listed.Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Accessory terminal supportDocumented humidifier, dehumidifier or ventilator accessory control and any terminal limits. One shared accessory terminal is not the same as independent control of several accessories. Some accessories need an isolation relay. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
C-wire requirementThe manufacturer's statement about needing a common (C) wire and how the thermostat is powered without one. A design that works without a C wire in most homes can still require one for particular systems. Treat percentages as manufacturer statements. | C-wire required (24 VAC).Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Power adapter or extender in this packageWhether the selected US package ships with a C-wire adapter, power extender kit or power connector. An accessory sold separately or promoted free in one channel is not box content. Check the exact package before ordering. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Remote sensors in this packageCount of wireless room or temperature sensors supplied in the selected US package. Zero included does not establish that sensors are unsupported; some thermostats do not support any remote sensor at all. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Wireless connectivityDocumented Wi-Fi bands and other radios in the thermostat. A 2.4 GHz-only radio needs that band enabled on your router. A listed radio does not by itself establish Thread or Matter support. | WiFi 2.4 or 5GHz (802.11 b/g/n).Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Matter certifiedWhether the manufacturer documents Matter certification or Matter control. Matter control may still require the maker's app for setup. Matter is not the same as a native Alexa, Google or HomeKit integration. | YesFootnoted as Matter Certified with a Matter supplement for the QR code.Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Thread radio documentedWhether the manufacturer explicitly documents Thread support. An 802.15.4 or sub-GHz radio listing is not a Thread claim. Unknown means no explicit statement was found. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Apple HomeKit or Apple Home namedWhether the manufacturer names Apple HomeKit or Apple Home as a supported platform. Matter-only compatibility with Apple Home is not recorded as HomeKit support unless the manufacturer names Apple. | YesApple Home/HomeKit, Amazon Alexa and Google Assistant are named.Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Display and controlDocumented screen type, size or resolution and the primary local control method. Screen size does not rank usability. Some thermostats are controlled by a side touch strip or ring rather than a touchscreen. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Built-in humidity sensorWhether the thermostat itself documents a humidity sensor. Sensing humidity is separate from controlling a humidifier or dehumidifier, which depends on accessory support and wiring. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Built-in air quality monitoringWhether the manufacturer documents an indoor air quality sensor in the thermostat. Air quality monitoring names a feature, not a measured accuracy. The sensed parameters may not be published. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
Built-in occupancy or motion sensorWhether the thermostat documents a built-in occupancy, motion or radar sensor. Geofencing through a phone and remote sensors are different mechanisms from a sensor in the thermostat. | Not verifiedWe have not verified this value. It is not a confirmed no or zero. Check the original source or ask the manufacturer if it affects your choice. Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
App, account and subscriptionsThe documented app required for setup and any optional or required subscriptions. Core heating and cooling control normally works without a paid plan; security or filter services are separate subscriptions. | Resideo Connect app, listed in the app stores as First Alert by Resideo. Account requirements are not stated.Source · 2026-10-21Honeywell Home (Resideo): X2S Smart Thermostat RTH2CWF/U product pageChecked 2026-10-21. We reviewed the official page text on the check date. Checkout options were not verified. |
| Questions to check before buying | A published compatibility list is a manufacturer statement, not a tested installation guarantee; the manufacturer compatibility checker and the actual wiring decide. The manufacturer page showed Unavailable and a backorder notice when checked; availability was not verified. Box contents, display technology and humidity sensing are not published on the page. |
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