Honeywell Home X7S Smart Thermostat X7SMC4B (Black) vs Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor)
These are side-by-side facts taken from each product guide: published specifications, strengths and caveats as their sources state them. This page is not a test, a ranking or a verdict about which model is better.
Check Honeywell Home X7S Smart Thermostat X7SMC4B (Black) on AmazonCheck Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor) on Amazon
Honeywell Home X7S Smart Thermostat X7SMC4B (Black)
24 VAC systems up to 2H/2C, or heat pumps with electric backup, where room sensors and presence sensing appeal
A 4.3-inch touchscreen Wi-Fi thermostat run through the First Alert app, with Matter, a built-in radar sensor and support for up to 20 XRSENSOR room sensors. It needs a C wire. The manual says X7 models cannot control humidifiers, dehumidifiers or ventilators, and heat pumps must use electric backup.
Published specifications
- Manual, maker, listing: up to 3H/2C heat pump (electric backup), 2H/2C conventional
- Manual: X7 cannot control humidifier, dehumidifier or ventilator
- Manual: radar sensor and up to 20 XRSENSOR room sensors on X7S only
- Manual: 24 VAC C wire required; Wi-Fi 2.4 and 5 GHz; 2.2 VA max
- Manual and maker: 90 x 133 x 24 mm; 4.3-inch display; heat 40-90°F, cool 50-99°F
- User guide: 2-year limited warranty
Strengths
- Radar presence sensing and up to 20 room sensors, per the manual
- Stage support agreed by manual, maker page and listing
- Two-year limited warranty in the user guide
Caveats
- Cannot control humidifiers, dehumidifiers or ventilators, per the manual
- Listing says an adapter or voucher is included; the manual calls the adapter optional
- Heat pumps: electric backup only, no gas or oil furnace backup
Read the full Honeywell Home X7S Smart Thermostat X7SMC4B (Black) guide
Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor)
24 VAC systems up to 2H/2C, or heat pumps with electric backup, where a doorbell view or room sensors appeal
A Wi-Fi thermostat with a 5-inch display, run through the First Alert app, with Matter, a built-in radar sensor, optional room sensors and a view for First Alert VX1 or Ring doorbells. It needs a C wire, with a free adapter voucher in the box, and supports only electric backup heat on heat pumps.
Published specifications
- Manual and listing: up to 3H/2C heat pump (electric backup), 2H/2C conventional
- Maker page table: up to 4H/2C heat pump, 3H/4C conventional (conflict)
- Manual: 24 VAC C wire required; free C-wire adapter voucher in box
- Manual: Wi-Fi 2.4 and 5 GHz; BLE; up to 20 XRSENSOR room sensors
- Manual: 90 x 133 x 24 mm; 5-inch display; heat 40-90°F, cool 50-99°F
- User guide and maker: 2-year limited warranty
Strengths
- Free C-wire adapter voucher included, per the manual and listing
- Doorbell view, radar and room-sensor support documented model by model
- Two-year limited warranty
Caveats
- Maker page stage counts conflict with the manual and listing
- Heat pumps: electric backup only, no gas or oil furnace backup
- Humidity or ventilation control may need extra HVAC equipment
Read the full Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor) guide
How to choose between them
Choose the Honeywell Home X7S Smart Thermostat X7SMC4B (Black) if your situation matches: 24 VAC systems up to 2H/2C, or heat pumps with electric backup, where room sensors and presence sensing appeal. Its main caveat: Cannot control humidifiers, dehumidifiers or ventilators, per the manual.
Choose the Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor) if your situation matches: 24 VAC systems up to 2H/2C, or heat pumps with electric backup, where a doorbell view or room sensors appeal. Its main caveat: Maker page stage counts conflict with the manual and listing.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- Honeywell Home X7S Smart Thermostat product page and specifications (SKU X7SMC4B/U) Source for Honeywell Home X7S Smart Thermostat X7SMC4B (Black)
- Resideo X7S & X7B Smart Thermostats Installation and User Manual 33-00769-01 Source for Honeywell Home X7S Smart Thermostat X7SMC4B (Black)
- Resideo X7 Series Smart Thermostat User Guide 33-00748EF-01 Source for Honeywell Home X7S Smart Thermostat X7SMC4B (Black)
- Honeywell Home X8S Smart Thermostat product page and specifications (SKU X8VMC8B/U) Source for Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor)
- Resideo X8S & X8Q Smart Thermostats Installation and User Manual 33-00759-01 Source for Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor)
- Resideo X8S Smart Thermostat User Guide 33-00730EF-01 Source for Honeywell Home X8S Smart Thermostat X8VMC8B (Black, no sensor)
Primary sources checked .