Smart Thermostats / Amazon Smart Thermostat vs Honeywell Home X2S (RTH2CWF)
Amazon Smart Thermostat vs Honeywell Home X2S (RTH2CWF)
Honeywell Home X2S (RTH2CWF)
The cheapest Matter thermostat here, if you have a C wire and forgive its thin Matter.
Wins overall by 0.6 points
Quick Verdict
A 0.6-point gap makes the Honeywell Home X2S (RTH2CWF) the straightforward choice here. The cheapest Matter thermostat here, if you have a C wire and forgive its thin Matter.
The Amazon Smart Thermostat and Honeywell Home X2S (RTH2CWF) are both closely matched smart Thermostat models, and they're priced almost identically ($79.99 vs $79.99). On Smart Home Integration, the Honeywell Home X2S (RTH2CWF) leads (6.5 vs 3.0/10) — matter, Apple Home, Alexa and Google support — and how much each one actually exposes. On HVAC Coverage, the Honeywell Home X2S (RTH2CWF) leads (6.0 vs 4.5/10) — stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals. On Multi-Room Sensing, the Amazon Smart Thermostat leads (2.5 vs 1.0/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature. Overall, the Honeywell Home X2S (RTH2CWF) scores 5.1/10 across our 8 scoring categories versus 4.5/10 for the Amazon Smart Thermostat. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Amazon Smart Thermostat | Honeywell Home X2S (RTH2CWF) |
|---|---|---|
| Price | $79.99 | $79.99 |
| Release Year | 2021 | 2025 |
| System Voltage | Low voltage 24V — Amazon lists conventional forced air, heat pump and radiant boiler. It does not work with 110-240V systems | Low voltage 24V. Resideo states it does not work with electric baseboard heat at 120-240V |
| C-Wire Required | Yes, hard requirement. Every Amazon, Best Buy and utility-store listing is titled 'C-wire required' | Yes, hard requirement. Resideo states a constant 24V C-wire supply is needed and the X2S is not battery powered |
| Adapter / Power Kit Included | No — the C-Wire Power Adapter is a separate purchase, or you buy the bundle SKU instead of this one | No adapter of any kind is included |
| Heating & Cooling Stages | Not published by Amazon. The listings say only 'most 24V heating and cooling systems (conventional forced air, heat pump, radiant boiler)' with no stage count anywhere — run Amazon's compatibility checker before buying | Up to 2 Heat/2 Cool conventional |
| Heat Pump & Aux Heat | Listed as compatible with heat pumps. Amazon does not publish how it handles auxiliary or emergency heat | Yes — up to 2 Heat/1 Cool heat pump with electric backup |
| Humidifier / Ventilator Terminals | None published, and no humidifier, dehumidifier or ventilator control is advertised anywhere in the listing | None published. Humidity is monitored and displayed, not controlled |
| Remote Sensors | No dedicated remote sensor exists for this thermostat. Best Buy's listing states comfort zones can use select Echo devices or the Amazon Smart Air Quality Monitor as temperature inputs instead | None. There is no room sensor option for this model |
| Occupancy Detection | None at the thermostat. Away behaviour comes entirely from Alexa Hunches | None. Away behaviour comes from geofencing in the First Alert app |
| Matter Support | No | Matter certified — but Matter Alpha's reviewer could see temperature, humidity and mode in SmartThings and could not get setpoint changes to take effect, which breaks the automations Matter is meant to enable |
| Voice & Smart Home Platforms | Amazon Alexa only. No Google Home, no Apple Home, no HomeKit, no SmartThings. The Alexa app is mandatory and most settings are not reachable on the thermostat screen at all | First Alert app by Resideo (required for setup and to generate the Matter code), Amazon Alexa, Google Assistant, Apple Home via Matter |
| Utility Rebates & Demand Response | ENERGY STAR certified and one of the most heavily rebated thermostats in US utility marketplaces; several utilities bundle it into demand-response enrolment | ENERGY STAR certified. Resideo's launch materials specifically call out enabling enrolment in utility energy-management programs |
| Account or Subscription Needed | No subscription, but an Amazon account and the Alexa app are required and there is no web dashboard | No subscription. A First Alert account is required |
| Warranty | 12 months | 24 months |
| Colors | White | Gray, White |
Category Scores
C-Wire Freedom
The Amazon Smart Thermostat leads clearly here, 1.5 against 1.0 — a 0.5-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 Honeywell Home X2S (RTH2CWF) does not close the gap elsewhere.
HVAC Coverage
The Honeywell Home X2S (RTH2CWF) leads clearly here, 6.0 against 4.5 — a 1.5-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 Amazon Smart Thermostat does not close the gap elsewhere.
Multi-Room Sensing
The Amazon Smart Thermostat leads clearly here, 2.5 against 1.0 — a 1.5-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 Honeywell Home X2S (RTH2CWF) does not close the gap elsewhere.
Smart Home Integration
The Honeywell Home X2S (RTH2CWF) leads clearly here, 6.5 against 3.0 — a 3.5-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 Amazon Smart Thermostat does not close the gap elsewhere.
Scheduling & Learning
The Amazon Smart Thermostat leads clearly here, 6.0 against 5.5 — a 0.5-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 Honeywell Home X2S (RTH2CWF) does not close the gap elsewhere.
Display & On-Device Control
The Honeywell Home X2S (RTH2CWF) leads clearly here, 5.0 against 3.5 — a 1.5-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 Amazon Smart Thermostat does not close the gap elsewhere.
Installation
The Honeywell Home X2S (RTH2CWF) leads clearly here, 7.0 against 6.5 — a 0.5-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 Amazon Smart Thermostat does not close the gap elsewhere.
Value
The Amazon Smart Thermostat and Honeywell Home X2S (RTH2CWF) are level here, at 8.5/10 each. what the money buys once accessories, adapters and sensors are added in is not what separates these two — look to the categories where the scores diverge.
Best For
Choose the Amazon Smart Thermostat if…
- • Multi-Room Sensing matters most to you — the Amazon Smart Thermostat scores 2.5/10 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 Amazon Smart Thermostat scores 1.5/10 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.).
Choose the Honeywell Home X2S (RTH2CWF) if…
- • Smart Home Integration matters most to you — the Honeywell Home X2S (RTH2CWF) scores 6.5/10 here (matter, Apple Home, Alexa and Google support — and how much each one actually exposes).
- • HVAC Coverage matters most to you — the Honeywell Home X2S (RTH2CWF) scores 6.0/10 here (stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals).
- • Display & On-Device Control matters most to you — the Honeywell Home X2S (RTH2CWF) scores 5.0/10 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
Amazon Smart Thermostat
Pros
- +$79.99 list, frequently discounted to $50-60, and rebated by more US utilities than almost anything else here
- +Honeywell Home hardware underneath, so the relay and wiring side is Resideo-grade rather than a no-name design
- +Alexa Hunches away-control works without you configuring a schedule at all
- +Trim plate included in the box, which Copeland charges extra for on the Sensi Touch 2
Cons
- −A C wire is a hard requirement and the adapter is not in the box — the real cost in a four-wire home is the thermostat plus an adapter
- −Alexa only. There is no Google Home, no Apple Home, no HomeKit and no Matter, so it is a dead end outside Amazon's ecosystem
- −Most settings are not on the thermostat itself; without a phone and the Alexa app you can barely configure it
- −No remote sensors of any kind — the Echo comfort-zone workaround is not the same as a real room sensor
- −Amazon publishes no stage count, no accessory terminals and no wiring detail, so multi-stage and heat-pump owners are buying blind
Honeywell Home X2S (RTH2CWF)
Pros
- +Matter certified, ENERGY STAR certified and dual-band Wi-Fi for $79.99 — nothing else here does all three that cheaply
- +2H/2C conventional staging is more than the similarly priced Sensi Lite or the Nest Thermostat publish
- +Mounts on Resideo's UWP plate, the same system professional installers use, which makes wiring tidy
- +2-year warranty at $80, double what Amazon and Google give at this price
Cons
- −A C wire is mandatory and no adapter is included — in a four-wire house this $80 thermostat becomes an electrician's callout
- −Matter works only for reading state in at least one reviewer's testing: setpoint changes sent over Matter did not stick
- −You have to install the First Alert app to get a Matter pairing code, so Matter does not free you from the vendor app
- −No room sensors and no occupancy sensing at all — this is strictly a one-room thermostat
- −No humidifier, dehumidifier or ventilator control
Shop by Need
FAQs
Is the Amazon Smart Thermostat or Honeywell Home X2S (RTH2CWF) better overall?+
Based on our 8-category scoring, the Honeywell Home X2S (RTH2CWF) 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 Smart Home Integration, the Amazon Smart Thermostat or the Honeywell Home X2S (RTH2CWF)?+
The Honeywell Home X2S (RTH2CWF) scores higher on Smart Home Integration (6.5/10 vs 3.0/10) — matter, Apple Home, Alexa and Google support — and how much each one actually exposes.
Which is better for HVAC Coverage, the Amazon Smart Thermostat or the Honeywell Home X2S (RTH2CWF)?+
The Honeywell Home X2S (RTH2CWF) scores higher on HVAC Coverage (6.0/10 vs 4.5/10) — stages of heating and cooling, heat pump and auxiliary heat handling, and humidifier / dehumidifier / ventilator terminals.
Which is better for Multi-Room Sensing, the Amazon Smart Thermostat or the Honeywell Home X2S (RTH2CWF)?+
The Amazon Smart Thermostat scores higher on Multi-Room Sensing (2.5/10 vs 1.0/10) — remote sensors: included or extra, how many pair, and whether they read occupancy or only temperature.
Which is better for Display & On-Device Control, the Amazon Smart Thermostat or the Honeywell Home X2S (RTH2CWF)?+
The Honeywell Home X2S (RTH2CWF) scores higher on Display & On-Device Control (5.0/10 vs 3.5/10) — screen quality and how much you can do at the wall instead of in the phone app.
Is the Amazon Smart Thermostat worth the price difference over the Honeywell Home X2S (RTH2CWF)?+
They're priced the same ($79.99), so the decision comes down to which specific features and scores matter more to you rather than budget.
Which is better suited to my use case?+
The Amazon Smart Thermostat is the better fit if you mainly care about budget or heat-pump. The Honeywell Home X2S (RTH2CWF) is the better fit for matter.
What's the warranty on the Amazon Smart Thermostat vs the Honeywell Home X2S (RTH2CWF)?+
The Amazon Smart Thermostat ships with a 12-month warranty; the Honeywell Home X2S (RTH2CWF) 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 Thermostat (2020) — $129.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.