Looking Beyond the PRO1 IAQ PRO1 T855iSH 8-Inch WiFi? 6 Alternatives Worth a Look
Explore 6 alternatives to the pro1 iaq pro1 t855ish 8 inch wifi thermostat. We compare key specifications like display size, HVAC compatibility, and smart features to help you choose.
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The pro1 iaq pro1 t855ish 8 inch wifi alternatives list helps you find suitable replacements if this specific model does not fit your needs. This thermostat features an 8-inch backlit display and supports 2H/2C conventional or 5H/3C heat pump systems. Its large screen and keypad entry make it ideal for users who prioritize readability over touch interfaces. However, you might prefer a smaller footprint or different smart home integration. Some buyers seek dual-band connectivity or compatibility with Apple HomeKit, which this unit does not explicitly list.
We selected these 6 alternatives because their core specifications overlap with the PRO1 T855iSH. Each option supports standard HVAC staging and Wi-Fi connectivity. The list includes models with varying screen sizes, from compact 4-inch units to larger displays. You will find choices for heat pump systems with different stage configurations. Some entries emphasize Alexa or Google Assistant support, while others focus on Apple HomeKit. This guide compares these specs so you can match your exact system requirements without guessing.
How the Alternatives Compare
Honeywell Home T6 Pro Wi-Fi Thermostat
The Honeywell Home T6 Pro offers a much smaller footprint at 4.06 inches square compared to the PRO1’s large 8-inch screen. It shares the same 2H/2C conventional and heat pump compatibility, but it lacks the PRO1’s extensive 5H/3C heat pump staging. This model prioritizes smart home integration with Apple HomeKit and Alexa support. You give up the large backlit display and glow-in-the-dark button for a more compact design that fits standard wall spaces. Choose this if you need robust voice assistant connectivity and do not require the visual clarity of a larger interface for your HVAC setup.
Honeywell Lyric T6 Pro Smart Thermostat
This Honeywell Lyric T6 Pro model is another compact option, measuring just 1.09 inches thick. It matches the PRO1 in supporting 2H/2C systems but does not offer the advanced 5H/3C heat pump stages found in the PRO1 T855iSH. It includes smart home features for HomeKit and Alexa integration. The trade-off is the loss of the large, easy-to-read 8-inch display and the physical keypad controls. You get a sleeker profile that blends into modern interiors. Select this alternative if you prefer a minimalist aesthetic and rely on voice commands or apps rather than a large touchscreen or backlit keypad for daily temperature adjustments.
PORTEXA FocusPRO S200 Smart Thermostat
The PORTEXA FocusPRO S200 supports 3H/2C heat pump configurations, offering more heating stages than the PRO1’s 2H/2C conventional mode, though it matches the 2H/2C heat pump limit. It features dual-band Wi-Fi for potentially more stable connectivity in crowded networks. This model includes compatibility with Amazon Alexa and Google Assistant. You lose the massive 8-inch display and the specific glow-in-the-dark button feature. The interface is likely smaller and less prominent. Pick this thermostat if your system benefits from additional heating stages and you need reliable dual-band Wi-Fi support without the bulk of a large screen unit.
Honeywell Lyric T6 4.09" Heat Pump Thermostat
The Honeywell Lyric T6 is significantly smaller, with a 4.09-inch square body and a 2.5-inch display, compared to the PRO1’s 8-inch screen. It supports 2H/2C and 3H/2C heat pump systems, providing slightly more heat staging than the PRO1’s conventional setup. It retains Wi-Fi connectivity for remote control. The main sacrifice is the large, backlit readability and the dedicated glow button. You get a compact, unobtrusive design that takes up less wall space. This is a good choice if you have a standard heat pump system and prioritize a small physical footprint over the enhanced visibility and scheduling features of the larger PRO1 model.
Playhardest T6 Pro White Smart Thermostat
This Playhardest T6 Pro model supports both 2H/2C and 3H/2C configurations, offering more heat staging options than the PRO1’s 2H/2C conventional limit. It is designed for Apple HomeKit users with heat pump systems. The device includes ventilation and dual fuel features for advanced control. You give up the large 8-inch display and the physical keypad in favor of a more integrated smart home experience. The dimensions are larger than the compact Honeywell models but smaller than the PRO1. Choose this if you need advanced staging for your heat pump and want seamless integration with Apple’s ecosystem without managing a large physical interface.
Ecobee Smart Thermostat Essential Wi-Fi
The Ecobee Smart Thermostat Essential features a color touchscreen and supports Apple HomeKit, Alexa, and Google Assistant. It is designed for standard 2-stage HVAC systems, matching the PRO1’s conventional capacity but lacking the 5H/3C heat pump support. The unit is compact at 3.62 inches square and weighs only 3.2 ounces. You lose the large 8-inch backlit display and the physical keypad controls. This model may require extra hardware for C-Wire setups. Select this alternative if you prioritize multi-platform smart home compatibility and a modern touchscreen interface over the large screen and robust heat pump staging capabilities of the PRO1 thermostat.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | PRO1 T855iSH 8-Inch WiFi Thermostat Best overall | Large display heat pump control | |
| 2 | Honeywell Home T6 Pro Wi-Fi Thermostat Also great | Standard 2-stage HVAC systems with smart home needs | |
| 3 | Honeywell Lyric T6 Pro Smart Thermostat Best premium | Standard 2H/2C conventional systems with smart home needs | |
| 4 | PORTEXA FocusPRO S200 Smart Thermostat Best budget | homes with 3H/2C heat pump systems needing dual-band WiFi | |
| 5 | Honeywell Lyric T6 4.09" Heat Pump Thermostat Also great | Standard heat pump systems needing compact control | |
| 6 | Playhardest T6 Pro White Smart Thermostat Also great | Apple HomeKit users with heat pump systems | |
| 7 | Ecobee Smart Thermostat Essential Wi-Fi Best apple homekit | Apple HomeKit users with standard HVAC systems |
PRO1 T855iSH 8-Inch WiFi Thermostat
Best for: Large display heat pump control
- HVAC Compatibility
- Conventional, heat pump
- HVAC Stages
- 2H/2C Conventional, 5H/3C Heat Pump
- Display Size
- 8 in
- Wireless Connectivity
- Wi-Fi
- Entry Method
- Keypad
- Color
- White
The PRO1 IAQ T855iSH is an 8-inch backlit WiFi thermostat designed for clear visibility and flexible scheduling. It supports 2H/2C conventional and 5H/3C heat pump systems. The large display features a bright blue backlight and glow-in-the-dark button for easy reading in low light. You get 7-day programmable options and auto changeover. This unit suits users who want a large interface and broad HVAC compatibility without complex app management.
- Large 8-inch backlit display with glow button
- Supports 5H/3C heat pump systems
- 7-day programmable scheduling with auto changeover
- Adjustable room temperature calibration and setpoint limits
- Hardwired 24V power with universal sub-base
- Smaller 8-inch display compared to larger smart screens
- Keypad entry only, lacking touchscreen interface
- No mention of integrated air quality sensors
- You need a large, easy-to-read display for low-light rooms
- You have a 5H/3C heat pump system requiring high stage support
- You prefer direct keypad control over smartphone app management
- You require a touchscreen interface for navigation
- You want integrated air quality monitoring sensors
- You prefer a compact unit under 6 inches wide
Verdict: PRO1 IAQ 8-inch WiFi Thermostat fits users who prioritize large, backlit readability and robust heat pump compatibility over touchscreen convenience. It delivers straightforward scheduling and precise calibration for residential or light commercial HVAC setups.
Honeywell Home T6 Pro Wi-Fi Thermostat
Best for: Standard 2-stage HVAC systems with smart home needs
- Smart Home Compatibility
- Apple HomeKit, Amazon Alexa
- C-Wire Requirement
- Required
- HVAC Stages
- 2H/1C heat pump, 2H/2C conventional
- Wireless Connectivity
- Wi-Fi
- Color
- White
- Dimensions
- 5 × 2.3 × 6 inches
The Honeywell Lyric T6 Pro is a 7-day programmable thermostat with a white finish. It supports 2H/1C heat pump or 2H/2C conventional systems. The unit requires a C-wire for hardwired installation. It integrates with Apple HomeKit and Amazon Alexa for voice control. Geofencing helps manage schedules automatically. This model suits users seeking reliable smart home connectivity for standard HVAC setups.
- Supports 2H/1C heat pump and 2H/2C conventional HVAC stages
- Integrates with Apple HomeKit and Amazon Alexa
- Includes geofencing for automated schedule management
- Offers 7-day, 5-2, and 5-1-1 programming options
- Limited to 2 heat and 1 cool stage for heat pump systems
- Requires a C-wire for hardwired power connection
- You need Apple HomeKit or Alexa compatibility
- You have a 2H/2C conventional HVAC system
- You want geofencing for automatic schedule adjustments
- You require 3 heat or 3 cool stages
- Your system does not have a C-wire available
- You need support for more than 2 heat stages
Verdict: Honeywell Lyric T6 Pro WiFi Thermostat fits homes with standard 2-stage heat pump or conventional systems. It is ideal for users who prioritize Apple HomeKit or Alexa integration over higher heating stages.
Honeywell Lyric T6 Pro Smart Thermostat
Best for: Standard 2H/2C conventional systems with smart home needs
- Smart Home Compatibility
- Apple HomeKit, Amazon Alexa
- HVAC Compatibility
- Heat pump, conventional
- HVAC Stages
- 2H/1C heat pump, 2H/2C conventional
- Room Sensor Support
- Supported (optional)
- Wireless Connectivity
- Wi-Fi
- Color
- White
The Honeywell T6 Pro offers Wi-Fi control with a large touchscreen display. It supports up to 2 heat and 2 cool stages for conventional systems or 2 heat and 1 cool for heat pumps. You can use optional indoor or outdoor sensors to improve accuracy. The device works with Apple HomeKit and Amazon Alexa. This ENERGY STAR certified unit suits homes needing reliable smart scheduling without complex multi-stage setups.
- Supports 2H/2C conventional or 2H/1C heat pump systems
- Compatible with Apple HomeKit and Amazon Alexa
- Allows optional wired indoor/outdoor sensors
- Features a large touchscreen display
- Limited to 2 heat and 1 cool stages for heat pumps, which is fewer stages than some competitors offering 3H/2C
- Optional sensors are not included in the bundle, requiring separate purchase for full functionality
- You have a conventional HVAC system with up to two heat and two cool stages
- You want to integrate your thermostat with Apple HomeKit or Amazon Alexa
- You plan to add optional room sensors for better temperature accuracy
- You need a heat pump system with more than two heat or one cool stage
- You require bundled indoor or outdoor sensors for immediate use
- You prefer a thermostat with a smaller form factor than the 4-inch width
Verdict: Honeywell T6 Pro Smart Thermostat fits users who need standard 2H/2C conventional support and smart home integration via HomeKit or Alexa. It is a solid choice for those willing to buy sensors separately for enhanced control.
PORTEXA FocusPRO S200 Smart Thermostat
Best for: homes with 3H/2C heat pump systems needing dual-band WiFi
- Smart Home Compatibility
- Amazon Alexa, Google Assistant
- HVAC Compatibility
- Heat pump, conventional
- HVAC Stages
- 3H/2C heat pump, 2H/2C conventional
- Wireless Connectivity
- 2.4GHz or 5GHz WiFi
- Color
- White
The PORTEXA FocusPRO S200 is a white smart thermostat with dual-band WiFi. It supports 3H/2C heat pump and 2H/2C conventional systems. You get 7-day scheduling, geofencing, and voice control via Alexa or Google Assistant. This model suits homes needing flexible HVAC compatibility and reliable remote management through the First Alert by Resideo app.
- Supports 3H/2C heat pump and 2H/2C conventional HVAC systems
- Connects to 2.4GHz or 5GHz WiFi for remote access
- Compatible with Amazon Alexa and Google Assistant
- Offers 7-day, 5-2, 5-1-1, and one-week scheduling options
- Includes geofencing and UWP wall plate for easier installation
- Limited to 3 heat and 2 cool stages for heat pump systems
- White finish only available in the current model data
- You need a thermostat that supports 3H/2C heat pump setups
- You want dual-band WiFi connectivity for stable smart home integration
- You prefer scheduling flexibility with geofencing and multiple weekly patterns
- You require more than 3 heat stages for your heat pump system
- You need compatibility with smart home platforms other than Alexa or Google Assistant
- You prefer a thermostat with multiple color options beyond white
Verdict: PORTEXA FocusPRO S200 Smart Thermostat fits homeowners with 3H/2C heat pump systems who value dual-band WiFi and flexible scheduling. It delivers practical smart control without unnecessary complexity.
Honeywell Lyric T6 4.09" Heat Pump Thermostat
Best for: Standard heat pump systems needing compact control
- HVAC Stages
- 3H/2C heat pump, 2H/2C conventional
- Color
- White
- Dimensions
- 4.09 × 4.09 × 1.06 inches
- Weight
- 12 ounces
The Honeywell Lyric T6 is a white Wi-Fi thermostat with a 2.5-inch display. It supports 3H/2C heat pump and 2H/2C conventional systems. The unit measures 4.09 inches square and weighs 12 ounces. It suits users needing reliable heat pump control. You get a compact design that fits standard wall plates. This model offers straightforward programming for your HVAC needs.
- Supports 3 Heat / 2 Cool heat pump systems
- Compatible with 2 Heat / 2 Cool conventional setups
- Compact 4.09-inch square form factor
- Includes a 2.5-inch display screen
- Smaller 2.5-inch display compared to larger 8-inch options
- Heavier at 12 ounces compared to lighter competitors
- Limited to 5 stages of heating and cooling
- You have a heat pump system with up to 3 stages
- You prefer a compact white thermostat for your wall
- You want a reliable Wi-Fi model for basic scheduling
- You need more than 5 stages of HVAC control
- You prefer a larger display for easier reading
- You want a lighter device for minimal wall mounting
Verdict: Honeywell Lyric T6 White Thermostat fits users with standard heat pump systems who value a compact, reliable design. It delivers essential Wi-Fi features without unnecessary bulk.
Playhardest T6 Pro White Smart Thermostat
Best for: Apple HomeKit users with heat pump systems
- Smart Home Compatibility
- Apple HomeKit
- HVAC Compatibility
- Dual fuel, ventilation control
- HVAC Stages
- 3H/2C Heat Pump, 2H/2C Conventional
- Color
- White
- Dimensions
- 1.97 × 5.12 × 5.91 inches
This Honeywell T6 Pro thermostat features a Wi-Fi touchscreen and supports 3 heat and 2 cool stages for heat pump systems. It also handles 2 heat and 2 cool conventional setups. The device integrates with Apple HomeKit and offers dual fuel and ventilation control. You can use flexible scheduling or geofence technology to manage your home climate efficiently.
- Supports 3H/2C heat pump and 2H/2C conventional HVAC stages
- Integrates with Apple HomeKit for smart home control
- Includes dual fuel and ventilation control capabilities
- Uses standard UWP mounting system for easy installation
- Supports only Apple HomeKit, excluding Google Home and Alexa
- Lacks the 7-day programming flexibility found in some competitors
- You use Apple HomeKit for smart home automation
- You have a heat pump system with 3 heat stages
- You need dual fuel and ventilation control options
- You rely on Google Home or Alexa for voice control
- You require a conventional 2H/2C system without heat pump support
- You prefer a thermostat with a backlit display
Verdict: Honeywell T6 Pro Smart Thermostat is a solid choice for Apple HomeKit users with heat pump systems needing advanced staging. It delivers precise control through dual fuel and ventilation features.
Ecobee Smart Thermostat Essential Wi-Fi
Best for: Apple HomeKit users with standard HVAC systems
- Smart Home Compatibility
- Alexa, Google Assistant, HomeKit
- C-Wire Requirement
- Adapter sold separately
- HVAC Compatibility
- 24 VAC, heat pump, dual fuel
- HVAC Stages
- 2H/1C or 1H/2C, 2H/1C heat pump
- Wireless Connectivity
- Wi-Fi
- Color
- White
The ecobee Smart Thermostat Essential is a white, Wi-Fi enabled unit designed for 24 VAC HVAC systems. It supports 2H/1C or 1H/2C conventional setups and 2H/1C heat pumps. The device features a color touchscreen and works with Apple HomeKit, Google Assistant, and Alexa. It measures 3.62 inches square and weighs 3.2 ounces. This thermostat suits users who want energy tracking and multi-ecosystem compatibility.
- Compatible with Apple HomeKit, Google Assistant, and Alexa
- Supports 2H/1C and 1H/2C conventional HVAC systems
- Includes a color touchscreen for manual control
- Measures 3.62 inches square for a compact wall fit
- Limited to 2 heating and 1 cooling stage for heat pumps
- Requires a separate Power Extender Kit for homes without a C-Wire
- You use Apple HomeKit for smart home automation
- You have a conventional 2H/1C or 1H/2C HVAC system
- You want a thermostat with a color touchscreen display
- You need 3 heating stages for your heat pump system
- You require a C-Wire included with the thermostat
- You only use Google Assistant and prefer a simpler interface
Verdict: The ecobee Smart Thermostat Essential White fits users who need Apple HomeKit integration and a color touchscreen. It handles standard 2-stage systems well but requires extra hardware for C-Wire setups.
Specifications side by side
| Spec | PRO1 T855iSH 8-Inch WiFi Thermostat | Honeywell Home T6 Pro Wi-Fi Thermostat | Honeywell Lyric T6 Pro Smart Thermostat | PORTEXA FocusPRO S200 Smart Thermostat | Honeywell Lyric T6 4.09" Heat Pump Thermostat | Playhardest T6 Pro White Smart Thermostat | Ecobee Smart Thermostat Essential Wi-Fi |
|---|---|---|---|---|---|---|---|
| Smart Home Compatibility | – | Apple HomeKit, Amazon Alexa | Apple HomeKit, Amazon Alexa | Amazon Alexa, Google Assistant | – | Apple HomeKit | Alexa, Google Assistant, HomeKit |
| C-Wire Requirement | – | Required | – | – | – | – | Adapter sold separately |
| HVAC Compatibility | Conventional, heat pump | – | Heat pump, conventional | Heat pump, conventional | – | Dual fuel, ventilation control | 24 VAC, heat pump, dual fuel |
| HVAC Stages | 2H/2C Conventional, 5H/3C Heat Pump | 2H/1C heat pump, 2H/2C conventional | 2H/1C heat pump, 2H/2C conventional | 3H/2C heat pump, 2H/2C conventional | 3H/2C heat pump, 2H/2C conventional | 3H/2C Heat Pump, 2H/2C Conventional | 2H/1C or 1H/2C, 2H/1C heat pump |
| Room Sensor Support | – | – | Supported (optional) | – | – | – | – |
| Wireless Connectivity | – | – | – | 2.4GHz or 5GHz WiFi | – | – | – |
| Display Size | 8 in | – | – | – | – | – | – |
| HVAC System Compatibility | Heat Pump, Conventional | Heat Pump, Conventional | Heat Pump, Conventional | Heat Pump, Conventional | Heat Pump, Conventional | Heat Pump, Conventional | – |
| Entry Method | Keypad | – | – | – | – | – | – |
| Color | White | White | White | White | White | White | White |
| Control Method | – | – | – | Alexa | – | – | Alexa |
| Compatibility | – | – | – | Google Home | – | – | Google Home |
| Dimensions | 1.75 × 5.25 × 5.25 inches | 5 × 2.3 × 6 inches | 5.5 × 4 × 2.5 inches | – | 4.09 × 4.09 × 1.06 inches | 1.97 × 5.12 × 5.91 inches | 0.91 × 3.62 × 3.62 inches |
| Weight | 11.4 ounces | 12 ounces | – | – | 12 ounces | – | 3.2 ounces |
| Model | T855iSH | TH6220WF2006 | TH6220WF2006 | TH2320WF4010 | TH6320WF2003/U | TH6320WF2003 | EB-STATE7-01 |
| Size | – | 4.06 inches square | 1.09 x 4.06 x 4.06 inches | – | 4.09" x 4.09" x 1.06" DEEP; DISPLAY IS 2.5" X 2.5" | – | 1-Pack |
Frequently asked questions
Which thermostat is best for Apple HomeKit users?
The Ecobee Smart Thermostat Essential and the Playhardest T6 Pro both support Apple HomeKit. The Ecobee model includes a color touchscreen and works with standard 2-stage systems. The Playhardest option offers dual fuel and ventilation features for heat pump setups. Choose the Ecobee for a modern interface or the Playhardest for advanced staging control.
What are the best alternatives for heat pump systems?
The PRO1 T855iSH supports up to 5H/3C heat pump staging. The PORTEXA FocusPRO S200 handles 3H/2C systems with dual-band WiFi. The Honeywell Lyric T6 and Playhardest T6 Pro also support heat pump configurations. Select the PRO1 for maximum staging or the PORTEXA for flexible scheduling on 3-stage units.
Do these thermostats work with Google Home?
The PORTEXA FocusPRO S200 and Ecobee Smart Thermostat Essential both list Google Home compatibility. The Ecobee also supports Amazon Alexa and Apple HomeKit. The Honeywell models generally integrate with Alexa but do not explicitly list Google Home in their attributes. Verify your specific model’s smart home support before purchasing.
Which thermostat has the largest display?
The PRO1 T855iSH features an 8-inch backlit display, which is significantly larger than the alternatives. The Honeywell Lyric T6 has a 2.5-inch display within a 4.09-inch square unit. The Ecobee includes a color touchscreen. If readability is your priority, the PRO1’s large screen is the clear choice for residential or light commercial use.
Is there a budget-friendly option with smart features?
The PORTEXA FocusPRO S200 is marked as the best budget option. It supports dual-band WiFi and flexible scheduling for 3H/2C heat pump systems. It integrates with Amazon Alexa and Google Assistant. This model provides practical smart control without the complexity or cost of premium touchscreens, making it suitable for standard HVAC needs.
How do these compare in physical size?
The PRO1 T855iSH is 5.25 inches square with a 1.75-inch depth. The Honeywell Home T6 Pro is 4.06 inches square. The Ecobee is compact at 3.62 inches square and only 0.91 inches deep. The Honeywell Lyric T6 measures 4.09 inches square. Choose the Ecobee or T6 Pro for smaller wall footprints.
Can these thermostats control 3-stage heating?
The PORTEXA FocusPRO S200 supports 3 Heat / 2 Cool staging. The Honeywell Lyric T6 and Playhardest T6 Pro also list 3H/2C compatibility in some configurations. The standard PRO1 T855iSH and Honeywell Home T6 Pro support 2H/2C. Ensure your HVAC wiring matches the thermostat’s staging capabilities for proper operation.
