Smart HVAC System Market Size, Share & Industry Analysis, By System Type (Heating Systems, Ventilation Systems, and Air Conditioning & Cooling Systems), By Component (Smart Thermostats, Sensors, Controllers, Smart Vents & Dampers, Actuators & Valves, Gateways & Communication Modules, and Others (HVAC Relays, HVAC Zone Panels)), By Sales Channel (Direct Sales, Distributors & Dealers, and Online Retail), By End User (Residential, Commercial, and Industrial), and Regional Forecast, 2026 – 2034