Smart Thermostats / Sensi Touch 2 (ST76) vs Honeywell Home X8S (X8VMC8B/U)
Sensi Touch 2 (ST76) vs Honeywell Home X8S (X8VMC8B/U)
Honeywell Home X8S (X8VMC8B/U)
Biggest screen and 20 room sensors, over a deliberately minimal Matter layer.
Wins overall by 1.3 points
Quick Verdict
The Honeywell Home X8S (X8VMC8B/U) takes this by a clear 1.3 points. Biggest screen and 20 room sensors, over a deliberately minimal Matter layer. The Sensi Touch 2 (ST76) only makes sense if it wins on a category you care about more than the total.
The Sensi Touch 2 (ST76) and Honeywell Home X8S (X8VMC8B/U) are both closely matched smart Thermostat models, and the Sensi Touch 2 (ST76) is $31 cheaper than the Honeywell Home X8S (X8VMC8B/U) ($189 vs $219.99). On Multi-Room Sensing, the Honeywell Home X8S (X8VMC8B/U) leads (9.0 vs 4.5/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature. On C-Wire Freedom, the Honeywell Home X8S (X8VMC8B/U) leads (4.5 vs 2.0/10) — how likely this thermostat is to run on the wiring you already have — whether it needs a common wire, and whether the workaround is in the box, sold separately, or an electrician's visit. The single biggest cause of returns in this category.. On Smart Home Integration, the Honeywell Home X8S (X8VMC8B/U) leads (6.5 vs 4.0/10) — matter, Apple Home, Alexa and Google support — and how much each one actually exposes. Overall, the Honeywell Home X8S (X8VMC8B/U) scores 7.3/10 across our 8 scoring categories versus 6.0/10 for the Sensi Touch 2 (ST76). Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Sensi Touch 2 (ST76) | Honeywell Home X8S (X8VMC8B/U) |
|---|---|---|
| Price | $189.00 | $219.99 |
| Release Year | 2022 | 2025 |
| System Voltage | Low voltage 24VAC — gas, oil, electric, heat pump, boilers. Not for 120/240V line-voltage heat | Low voltage 24V. Home Depot's listing states plainly that it does not work with 120-240V electric baseboard heat |
| C-Wire Required | Yes. Copeland's spec sheet requires 20-30VAC between RH/RC and C, and every retail listing is labelled 'C-Wire Required' | Yes — Resideo states the X8S needs a constant 24V supply through a common wire |
| Adapter / Power Kit Included | No — the Sensi C-Wire Kit is a separate purchase at roughly $28 | Not in the box, but Home Depot's listing says the package contains a voucher for a free mail-in Honeywell Home C-Wire Adapter |
| Heating & Cooling Stages | 1H/1C, 2H/2C multi-stage, and up to 4H/2C on heat pumps | Sources conflict: Resideo's own product page says up to 4 Heat/2 Cool on heat pumps or 3 Heat/4 Cool conventional, while Home Depot's listing for the same product says up to 3 Heat/2 Cool heat pump or 2 Heat/2 Cool conventional |
| Heat Pump & Aux Heat | Yes — up to 4 heat and 2 cool including auxiliary stages, the widest heat-pump staging here alongside the ecobee Premium | Yes, heat pump with electric backup |
| Humidifier / Ventilator Terminals | ACC+/ACC- terminals drive a humidifier or dehumidifier, with a humidify range of 5-50% RH and dehumidify 40-95% RH | Resideo advertises 'advanced indoor air quality control' but notes additional HVAC equipment may be required, and publishes no plain humidifier/dehumidifier/ventilator terminal list |
| Remote Sensors | Sensi Room Sensors at about $40 each, sold separately. Copeland states only the Touch 2 (ST76 / 1F96U series) supports them and does not publish a maximum count | One wireless room sensor is included with the X8VMC9W and X8VWF10B SKUs only — not with this one. Up to 20 sensors per home, 200ft range, $44.99 each |
| Occupancy Detection | None. TechHive's review notes the Sensi Room Sensor reads ambient temperature and humidity and has no motion detection, unlike competitors' sensors | Yes — onboard radar in the thermostat plus occupancy and presence detection in the room sensors |
| Matter Support | No. TechHive states the Touch 2 supports neither Matter nor Apple HomeKit | Matter certified, but shallow. Matter Alpha's review found the air quality readings the thermostat measures are not exposed over Matter at all, and scheduling still has to happen on the thermostat or in the First Alert app |
| Voice & Smart Home Platforms | Sensi app, Amazon Alexa, Google Assistant and Samsung SmartThings. No Apple Home | First Alert app by Resideo (required — you cannot generate the Matter pairing code without it), Amazon Alexa, Google Assistant, Apple Home via Matter |
| Utility Rebates & Demand Response | ENERGY STAR certified; Copeland runs Sensi demand-response partnerships with utilities and the thermostat is widely rebated | ENERGY STAR certified and rebate-eligible; Resideo pitches enrolment in utility energy-management programs |
| Account or Subscription Needed | No subscription, and Copeland markets an explicit 'we do not sell your data' privacy position | No subscription for thermostat features. A First Alert account is required, and Resideo ships several different apps which reviewers found confusing |
| Warranty | 36 months | 24 months |
| Colors | Black (ST76), White beveled edge (ST76W) | Black, White |
Category Scores
C-Wire Freedom
The Honeywell Home X8S (X8VMC8B/U) leads clearly here, 4.5 against 2.0 — a 2.5-point margin on how likely this thermostat is to run on the wiring you already have — whether it needs a common wire, and whether the workaround is in the box, sold separately, or an electrician's visit. The single biggest cause of returns in this category.. If that is what you are buying for, the Sensi Touch 2 (ST76) does not close the gap elsewhere.
HVAC Coverage
The Sensi Touch 2 (ST76) leads clearly here, 9.0 against 8.0 — a 1.0-point margin on stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals. If that is what you are buying for, the Honeywell Home X8S (X8VMC8B/U) does not close the gap elsewhere.
Multi-Room Sensing
The Honeywell Home X8S (X8VMC8B/U) leads clearly here, 9.0 against 4.5 — a 4.5-point margin on remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature. If that is what you are buying for, the Sensi Touch 2 (ST76) does not close the gap elsewhere.
Smart Home Integration
The Honeywell Home X8S (X8VMC8B/U) leads clearly here, 6.5 against 4.0 — a 2.5-point margin on matter, Apple Home, Alexa and Google support — and how much each one actually exposes. If that is what you are buying for, the Sensi Touch 2 (ST76) does not close the gap elsewhere.
Scheduling & Learning
The Honeywell Home X8S (X8VMC8B/U) leads clearly here, 7.5 against 6.5 — a 1.0-point margin on learning, geofencing, away detection and how much of it works without babysitting the app. If that is what you are buying for, the Sensi Touch 2 (ST76) does not close the gap elsewhere.
Display & On-Device Control
The Honeywell Home X8S (X8VMC8B/U) leads clearly here, 9.5 against 7.5 — a 2.0-point margin on screen quality and how much you can do at the wall instead of in the phone app. If that is what you are buying for, the Sensi Touch 2 (ST76) does not close the gap elsewhere.
Installation
The Sensi Touch 2 (ST76) leads clearly here, 7.0 against 6.0 — a 1.0-point margin on wiring complexity, guided setup, and how likely a DIY install is to end in a service call. If that is what you are buying for, the Honeywell Home X8S (X8VMC8B/U) does not close the gap elsewhere.
Value
The Sensi Touch 2 (ST76) leads clearly here, 7.5 against 7.0 — a 0.5-point margin on what the money buys once accessories, adapters and sensors are added in. If that is what you are buying for, the Honeywell Home X8S (X8VMC8B/U) does not close the gap elsewhere.
Best For
Choose the Sensi Touch 2 (ST76) if…
- • HVAC Coverage matters most to you — the Sensi Touch 2 (ST76) scores 9.0/10 here (stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals).
- • You want to spend less — it's $31 cheaper.
Choose the Honeywell Home X8S (X8VMC8B/U) if…
- • Multi-Room Sensing matters most to you — the Honeywell Home X8S (X8VMC8B/U) scores 9.0/10 here (remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature).
- • C-Wire Freedom matters most to you — the Honeywell Home X8S (X8VMC8B/U) scores 4.5/10 here (how likely this thermostat is to run on the wiring you already have — whether it needs a common wire, and whether the workaround is in the box, sold separately, or an electrician's visit. The single biggest cause of returns in this category.).
- • Smart Home Integration matters most to you — the Honeywell Home X8S (X8VMC8B/U) scores 6.5/10 here (matter, Apple Home, Alexa and Google support — and how much each one actually exposes).
- • Display & On-Device Control matters most to you — the Honeywell Home X8S (X8VMC8B/U) scores 9.5/10 here (screen quality and how much you can do at the wall instead of in the phone app).
- • Your main use case is matter.
Pros & Cons
Sensi Touch 2 (ST76)
Pros
- +4H/2C heat pump staging plus humidifier and dehumidifier terminals — genuinely serious HVAC coverage for under $200
- +3-year warranty and a published privacy stance that no other brand here makes explicit
- +Street price has settled around $189 against a $209.99 list, and it periodically drops much further
- +Real multi-stage and dual-fuel handling that the similarly priced Nest Thermostat and ecobee Essential do not offer
Cons
- −No Matter and no Apple HomeKit — the Touch 2 dropped the HomeKit support the original Sensi Touch had
- −C wire required and the C-Wire Kit is a ~$28 extra, where ecobee includes an equivalent kit free
- −Sensi Room Sensors are $40 each, sold separately, and detect temperature and humidity only — no occupancy
- −No decorative trim plate in the box, so old paint outlines and screw holes show
- −Copeland does not publish how many room sensors can pair, which makes planning a multi-room setup guesswork
Honeywell Home X8S (X8VMC8B/U)
Pros
- +Up to 20 room sensors at 200ft range — more sensor coverage than any other thermostat in this comparison bar the ecobees
- +5in colour touchscreen with a customisable idle screen, and it can display a Ring or First Alert doorbell feed
- +Radar occupancy in the thermostat plus presence detection in each sensor, at $40 under the ecobee Premium
- +The C-Wire Adapter is free — by mail-in voucher — where Amazon, Copeland and ecobee's Essential all charge for theirs
Cons
- −Matter support is thin: air quality data is not exposed over Matter at all and you still cannot schedule through it
- −You must install the First Alert app just to generate the Matter code, which defeats much of the point of Matter
- −Resideo's own page and Home Depot's listing give different stage counts for the same thermostat — verify against your system before buying
- −The free C-wire adapter is a mail-in voucher, not a part in the box, so a C-wire-less install stalls until it arrives
- −Reviewers hit setup failures at launch and found the doorbell integration buried and limited to Ring and First Alert VX1
Shop by Need
FAQs
Is the Sensi Touch 2 (ST76) or Honeywell Home X8S (X8VMC8B/U) better overall?+
Based on our 8-category scoring, the Honeywell Home X8S (X8VMC8B/U) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Multi-Room Sensing, the Sensi Touch 2 (ST76) or the Honeywell Home X8S (X8VMC8B/U)?+
The Honeywell Home X8S (X8VMC8B/U) scores higher on Multi-Room Sensing (9.0/10 vs 4.5/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature.
Which is better for C-Wire Freedom, the Sensi Touch 2 (ST76) or the Honeywell Home X8S (X8VMC8B/U)?+
The Honeywell Home X8S (X8VMC8B/U) scores higher on C-Wire Freedom (4.5/10 vs 2.0/10) — how likely this thermostat is to run on the wiring you already have — whether it needs a common wire, and whether the workaround is in the box, sold separately, or an electrician's visit. The single biggest cause of returns in this category..
Which is better for Smart Home Integration, the Sensi Touch 2 (ST76) or the Honeywell Home X8S (X8VMC8B/U)?+
The Honeywell Home X8S (X8VMC8B/U) scores higher on Smart Home Integration (6.5/10 vs 4.0/10) — matter, Apple Home, Alexa and Google support — and how much each one actually exposes.
Which is better for Display & On-Device Control, the Sensi Touch 2 (ST76) or the Honeywell Home X8S (X8VMC8B/U)?+
The Honeywell Home X8S (X8VMC8B/U) scores higher on Display & On-Device Control (9.5/10 vs 7.5/10) — screen quality and how much you can do at the wall instead of in the phone app.
Is the Sensi Touch 2 (ST76) worth the price difference over the Honeywell Home X8S (X8VMC8B/U)?+
The Sensi Touch 2 (ST76) is the cheaper option at $189 versus $219.99. Whether the pricier model is "worth it" depends on how much you value its lead in Multi-Room Sensing.
Which is better suited to my use case?+
The Sensi Touch 2 (ST76) is the better fit if you mainly care about heat-pump or multi-room. The Honeywell Home X8S (X8VMC8B/U) is the better fit for matter.
What's the warranty on the Sensi Touch 2 (ST76) vs the Honeywell Home X8S (X8VMC8B/U)?+
The Sensi Touch 2 (ST76) ships with a 36-month warranty; the Honeywell Home X8S (X8VMC8B/U) ships with a 24-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Sensi Lite (ST25) — $79.00
Premium Option
Google Nest Learning Thermostat (4th gen) — $239.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.