The primary differences between the Honeywell Home T9 and T10 Pro center on professional equipment support: The T9 is a consumer-retail model designed for standard heating and cooling systems, while the T10 Pro is a contractor-grade model that adds comprehensive management for indoor air quality accessories, including humidifiers, dehumidifiers, and active ventilation systems. Both models share identical high-resolution touchscreen styling and support up to 20 wireless room sensors. Verification: Check the wiring terminal block and software menu options to confirm support for specialized air quality accessories.
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