Introduction: A New Command Center for the Modern Smart Home

For decades, the thermostat has been a humble, utilitarian device, quietly regulating temperature from an unassuming spot on the wall. Its role was simple: keep the home warm in winter and cool in summer. Today, however, the expectations for this central fixture have evolved dramatically. In an era of interconnected devices, the thermostat is no longer just a climate controller; it is poised to become a hub for comfort, convenience, and even security. Leading this transformation is a new flagship offering from one of the most trusted names in home comfort. The Honeywell Home X8S Smart Thermostat is a bold reimagining of what a thermostat can be. It combines a stunning, customizable touchscreen with advanced indoor air quality management, intelligent energy-saving features, and a groundbreaking capability: the ability to see and speak to visitors at your front door, all from the thermostat itself. It is designed to be the centerpiece of a smarter, more responsive, and more comfortable home.

First Impressions: A Premium, Customizable Design

The X8S immediately sets itself apart from its predecessors and competitors with its striking aesthetic. The device features a sleek, modern design with rounded edges and a large, 5-inch touchscreen display that dominates its face . This is the largest touchscreen in its class, offering enhanced visibility and a significantly more premium feel than the smaller, more utilitarian screens found on many smart thermostats .

Personalization at Its Core
What truly elevates the X8S’s design is its commitment to personalization. The display is not just a functional screen; it is a customizable canvas. Users can choose from various idle screen themes, including a digital or analog clock, a five-day weather forecast, or indoor air quality information . Beyond themes, the color combinations and overall style can be adjusted to match the homeowner’s décor and personal taste, allowing the thermostat to blend seamlessly into any interior design scheme . Available in both classic white and bold black finishes, it is designed to complement, not clash with, its surroundings .

The Standout Feature: Video Doorbell Integration

The X8S’s most talked-about and innovative feature is its ability to integrate with select smart video doorbells, transforming the thermostat into a whole-home intercom and security viewer .

See and Speak from the Wall
Compatible with First Alert VX1 and Ring video doorbells, the X8S allows homeowners to see live video feeds and communicate with visitors directly from the thermostat’s screen . When someone rings the doorbell, the thermostat can display the live feed, and users can engage in two-way conversation without needing to reach for their phone or rush to the door . This feature adds an unparalleled layer of convenience and awareness, turning a hallway thermostat into a valuable security and communication tool.

A Novel Feature with Practical Considerations
Reviews have noted that while the feature works as advertised, the video quality on the thermostat screen may not be as crisp as on a smartphone app . Furthermore, the usefulness of this feature depends heavily on the thermostat’s location; having an intercom in a central hallway is convenient, but it may not be the ideal place for a prolonged conversation . The setup process for linking a Ring doorbell has also been described as somewhat convoluted, buried deep within the app’s settings . Nevertheless, the capability itself is a significant innovation, marking the X8S as the first thermostat to support video streaming from multiple doorbell brands .

Precision Comfort and Indoor Air Quality Control

Beyond its video capabilities, the X8S excels in its primary mission: managing the home’s climate and air quality with precision.

Holistic Climate Management
The thermostat offers “precision comfort” that goes far beyond simple temperature control. It can monitor and manage indoor humidity, and for homes with compatible HVAC equipment, it can control ventilation systems to actively bring in fresh air and expel stale air . This focus on holistic air management helps maintain a consistently comfortable and healthier indoor environment.

“Feels Like” Temperature and Advanced Sensing
A standout software feature is the “Feels Like” temperature setting. Instead of simply heating or cooling to a set number, this opt-in feature factors in the indoor relative humidity to calculate a perceived comfort level, similar to how a heat index works outdoors . This ensures the home feels comfortable, not just mathematically precise. The thermostat’s display also provides real-time feedback on indoor humidity, and advanced models can track volatile organic compounds (VOCs) and estimate carbon dioxide levels, giving homeowners deeper insight into their air quality .

Proactive HVAC Monitoring and Alerts
The X8S continuously monitors the performance of the heating and cooling system. If it detects unusual patterns that could indicate a developing problem, it sends a notification to both the homeowner and their registered HVAC professional . This proactive alerting can help catch minor issues before they escalate into costly system failures or unexpected breakdowns, adding a layer of maintenance intelligence that protects both comfort and investment.

Intelligent Energy Savings and Smart Home Integration

As an ENERGY STAR certified device, the X8S is engineered to help reduce energy consumption and lower utility bills .

Occupancy and Presence Detection
The thermostat features advanced occupancy and presence detection, utilizing an onboard radar sensor to sense when the home is occupied . When the Auto-Away feature is enabled, the thermostat automatically adjusts the temperature to an energy-saving setpoint when no one is home, ensuring comfort is maximized when residents are present and energy is not wasted on an empty house .

Optional Wireless Room Sensors
To further enhance comfort and efficiency, the X8S is compatible with Honeywell Home wireless room sensors (sold separately, though some bundles include one) . These sensors can be placed in different rooms to monitor temperature and occupancy. They help eliminate hot and cold spots by allowing the system to prioritize comfort in the rooms that matter most at different times of the day—for example, focusing on the living room during the day and the bedrooms at night . Up to 20 sensors can be added to a single system, providing granular, whole-home climate data .

Remote Control and Matter Certification
Control is at the user’s fingertips, both on the device and remotely via the First Alert app (the central hub for Resideo’s family of products) . The thermostat is Matter certified, ensuring seamless interoperability with all major smart home platforms, including Amazon Alexa, Google Assistant, and Apple Home . This allows for easy voice control and integration into broader smart home routines and scenes.

Installation, Compatibility, and Practical Considerations

The X8S is designed to be a versatile upgrade for many homes, but it does have specific requirements.

HVAC System Compatibility
The thermostat supports a wide range of systems, including up to 4 heat/2 cool stages for heat pumps with electric backup, and up to 3 heat/4 cool stages for conventional systems (gas, oil, electric, forced air, hot water) . It requires a hardwired installation with a C-wire (common wire) for power, though Honeywell offers a free C-wire adapter for homes that lack one .

The Installation Experience
Installation uses the familiar Honeywell Home Universal Wall Plate (UWP), which is designed to simplify the mounting and wiring process . However, some reviewers have noted that the initial setup in the First Alert app can be frustrating, as the “X8S” was not listed by name in the device selection menu, requiring a call to customer support to identify the correct option . This highlights a point of friction in an otherwise streamlined product experience.

A Note on the App Ecosystem
It is important for new users to know that the correct app for the X8S is the First Alert app . Resideo, the parent company, is consolidating its smart home products under this single application. There are multiple Resideo apps in app stores, which can cause confusion, so downloading the correct one is the first step to a successful setup .

Conclusion: The Most Capable Thermostat in Honeywell’s Lineup

The Honeywell Home X8S Smart Thermostat is a bold and ambitious product that successfully expands the definition of what a thermostat can do. It delivers on all the fundamentals of a premium smart thermostat—precise temperature control, intelligent energy savings through occupancy sensing and room sensors, and seamless integration with major smart home platforms via Matter. Its stunning, customizable 5-inch touchscreen finally brings a modern, personalized aesthetic to the Honeywell lineup, allowing the device to blend with or enhance home décor. The groundbreaking video doorbell integration, while still a novel feature with some practical considerations, offers a genuine glimpse into the future of the thermostat as a central communication and security hub. For homeowners seeking the most advanced, feature-rich, and stylish thermostat from one of the most trusted names in the industry, the X8S represents a compelling and forward-thinking choice.