Honeywell Home T9 Smart Thermostat vs Johnson Controls GLAS Smart Thermostat
Side-by-side comparison of features, pricing, ratings, and alternatives.
The Honeywell Home T9 Smart Thermostat brings automated comfort and energy efficiency to your entire living space by utilizing wireless smart room sensors. It prioritizes temperatures in the rooms that matter most, helping you maintain ideal climates throughout your house while reducing energy waste when you are away. Equipped with intuitive touchscreen controls and seamless integration with major smart home ecosystems, the T9 allows you to manage your home climate from anywhere using a smartphone app or voice commands. Its geofencing capabilities automatically adjust settings based on your location, ensuring your home is comfortable the moment you walk through the door.
Beyond basic heating and cooling, GLAS uses built‑in sensors to detect pollutants, VOCs, and particulate matter, automatically adjusting ventilation to maintain a healthier home environment. Its AI algorithms learn your schedule and preferences, optimizing energy use without sacrificing comfort.
- Includes a wireless smart room sensor in the box
- Intuitive app and touchscreen interface
- Strong ecosystem compatibility with Alexa, Google, and Apple
- Geofencing prevents wasted energy when away
- Elegant glass design with clear data display
- Advanced air‑quality sensing and automatic ventilation
- AI learning reduces energy costs
- Full voice‑assistant and app control
- Requires a C-wire (common wire) for reliable power installation
- Additional room sensors must be purchased separately
- Lacks built-in smart speaker capabilities like Alexa or Google Assistant
- Higher upfront cost than basic thermostats
- Requires compatible HVAC system for full functionality
- Glass screen can show fingerprints and may need frequent cleaning
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The Verdict
AI-generated from listing dataThe Honeywell T9 offers solid smart‑home integration and includes a sensor at lower cost, while the Johnson GLAS adds premium design, built‑in Alexa, and advanced air‑quality monitoring at a higher price.
Key differences
- •Honeywell includes one wireless room sensor in the box; GLAS includes none.
- •GLAS has a built‑in Alexa voice assistant; Honeywell relies on external speakers.
- •GLAS provides continuous humidity and air‑quality sensing plus carbon‑footprint reporting; Honeywell only alerts extreme humidity.
- •Price: Honeywell $169.99 vs. GLAS $299.
- •Warranty: Honeywell 1‑year limited vs. GLAS 3‑year.
Pricing & value
Honeywell costs $169.99, $129 less than GLAS, giving better upfront value.
Warranty
GLAS offers a 3‑year limited warranty versus Honeywell's 1‑year.
Smart ecosystem compatibility
Honeywell works with Apple HomeKit, Alexa, and Google Assistant; GLAS only mentions Alexa integration.
Air‑quality monitoring
GLAS continuously tracks humidity and air quality; Honeywell only alerts extreme humidity.
Built‑in voice control
GLAS includes integrated Alexa; Honeywell lacks built‑in voice assistant.
Included room sensor
Honeywell ships with one wireless smart room sensor; GLAS ships with none.
Design & display
GLAS features a 4‑inch transparent OLED glass front; Honeywell has a standard color touchscreen.
Choose Honeywell Home T9 Smart Thermostat if…
Smart‑home owners who want affordable, multi‑room control and broad ecosystem support.
Choose Johnson Controls GLAS Smart Thermostat if…
Tech‑savvy users prioritizing premium design, built‑in Alexa, and detailed air‑quality insights.
Common questions
Do I need a C‑wire for either thermostat?
Honeywell requires a C‑wire for reliable power; GLAS wiring requirements are not specified.
Can I add extra room sensors to the Honeywell T9?
Yes, additional Honeywell sensors can be purchased separately.
Which thermostat offers a longer warranty?
The Johnson Controls GLAS provides a 3‑year limited warranty, compared to Honeywell's 1‑year.